To draw or take in, roots absorb water and nutrients.
A sour substance, an acid or sour soil has a low pH.
A hydroponic system that actively moves the nutrient solution.
Heavy clay soil that drains slowly - adobe is not suitable for container growing.
Roots that grow from unusual spots, as on the (stem) pericycle or endodermis of an older root - auxins may influence this type of growth.
Growing cannabis plants by misting roots suspended in air.
A substrate that is of nearly uniform size and used for the inert hydroponic medium.
Having to do with the economics of agriculture.
Refers to soil, or any substance, with a pH over 7.
A process in which an alkyl group is substituted or added to a compound.
Two genes, each of which occupies the same position on two homogeneous chromosomes.
Alternating Current (AC)
An electrical current that reverses its direction at regularly occurring intervals.
Can be either organic or mineral base, amendments change the texture of a growing medium.
Ampere (or Amp)
The unit used to measure the strength of an electric current.
A plant having staminate (male).
Pollinated by wind-dispersed pollen.
A plant that normally completes its entire life cycle in one year or less - cannabis is an annual plant.
Container for luminous gases; houses the arc in an High-Intensity Discharge (HID) lamp.
Reproducing using non-sexual means such as taking cuttings from a parent plant - will produce exact genetic replicas of the parent plant.
Classification of plant hormones, auxins are responsible for foliage and root elongation.
The common term that is given to a seed of unknown origin that was found in a bag of cannabis.
A stabilizing unit that regulates the flow of electricity and starts an High-Intensity Discharge (HID) lamp - a ballast consists of a transformer and a capacitor.
A good insect that eats bad, cannabis-munching insects.
To decompose through natural bacterial action - substances made of organic matter can be broken down naturally.
The production of a chemical compound by a plant.
Household laundry bleach is used in a mild water solution to sterilize grow rooms and as soil fungicide.
High-nitrogen organic fertilizer made from dried blood.
To yield cannabis flowers.
Fertilizer high in phosphorus and potassium that increases cannabis flower yield and weight.
A very short or dwarfed cannabis plant.
Small spur-like foliage that grows from the stem at the point from which flowers emerge.
Electrical circuit box having on/off switches rather than fuses, the main breaker box is also called a 'service panel.'
To sexually propagate cannabis under controlled circumstances.
A withering condition that attacks cannabis' flowering buds.
A substance that reduces the shock and cushions against fluctuations, many fertilizers contain buffer agents.
Outer glass envelope or jacket that protects the arc tube of an High-Intensity Discharge (HID) lamp.
Ball-shaped, resin-producing plant hair without a stalk.
Butane Hash Oil (or BHO)
Tissue made of undifferentiated cells produced by rooting hormones on plant cuttings.
Layer of cells which divide and differentiates into xylem and phloem and are responsible for growth.
Scientific family to which Cannabis (marijuana) and Humulus (hops) belong.
Cannabichromene (or CBC)
Second most abundant cannabinoid in cannabis, Cannabichromene (or CBC) is considered one of the 'big six' cannabinoids prominent in medical research. It doesn’t get as much attention, but CBC has the same origins as both Tetrahydrocannabinol (or THC) and Cannabidiol (or CBD) do in that they all stem from Cannabigerolic Acid (or CBGA). Cannabis plants produce CBGA, the precursor to three major cannabinoids: Tetrahydrocannabinolic Acid (or THCA), Cannabidiolic Acid (or CBDA), and Cannabichromenic Acid (or CBCA).
Cannabidiol (or CBD)
Cannabinoid Hyperemesis Syndrome (or CHS)
Proportional ratio and levels of major cannabinoids found in cannabis being tested. Cannabis testing is the scientific process of measuring different chemicals and compounds in the product. They can measure beneficial constituents like cannabinoids and terpenes, or not-so-desirable contaminants such as pesticides, mold, and residual solvents. Research is now showing that strains exhibit different compound profiles, unique 'fingerprints' built by a specific composition of cannabinoids and terpenes.
Cannabinol (or CBN)
Cannabis Essential Oil
Capitate Stalked Trichome
Resin-producing plant hair without a stalk, high in Tetrahydrocannabinol (or THC) content.
A neutral compound of carbon, hydrogen, and oxygen, mostly formed by green plants - sugar, starch, and cellulose are carbohydrates.
Carbon Dioxide (or CO2)
A colorless, odorless, tasteless gas in the air and necessary for plant life.
Carbon Dioxide (or CO2) Enrichment
Adding carbon dioxide (or CO2) gas to augment grow room or greenhouse atmosphere to speed the cannabis plants' growth.
Carbon Dioxide (or CO2) Extraction
Carbon Dioxide (or CO2) for Cultivation
A substance that destroys, kills or eats away by chemical activity.
The base structural unit of plants - a cell contains a nucleus, membrane, and chloroplasts.
A complex carbohydrate that stiffens a plant - outdoor stems contain more stiff cellulose than plants grown indoors.
A scale for measuring temperature where 100 degrees is the boiling point of water and 0 degrees is the freezing point of water.
A plant or organism with tissues from at least two genetically distinct parents.
Green photosynthetic matter of plants - chlorophyll is found in the chloroplasts of a cell and is necessary to photosynthesis.
The condition of a sick plant with yellowing leaving due to inadequate formation of chlorophyll, chlorosis is caused by a nutrient deficiency.
Microscopically small, dark-staining bodies visible in the nucleus of a cell at the time of nuclear cell division and the number in any species is usually constant - a cannabis plant has 10 pairs of chromosomes.
A circular route traveled by electricity from a power source, through an outlet, and back to the ground.
Soil made of very fine organic and mineral particles, clay soil drains slowly and is not suitable for container gardening.
The average condition of the weather in a grow room or outdoors.
A poisonous alkaloid from the autumn crocus, used in plant breeding to induce polypoid mutations.
For cannabis plants, air temperatures below 50 F (10 C).
An unheated outdoor structure usually clad in glass or clear plastic used to protect and acclimatize cannabis seedlings and plants.
The band of colors (measured in Nm) emitted by a light source.
A coloring agent that is added to many commercial fertilizers so the horticulturist knows there is fertilizer in the solution.
Soil condition that results from the tightly packed soil which limits aeration and root penetration.
Planting garlic, marigolds, etc., along with cannabis plants to discourage pests.
A mixture of decayed organic matter, high in nutrients - compost must be well-rotted before use.
The transformer in the ballast is often referred to as a core.
Seed leaves, first leaves that appear on a cannabis plant.
Cannabis high in Cannabidiol (or CBD) having psychoactive qualities that sneak up on the smoker - highs usually last longer.
Critical Day Length
Maximum day length which will bring about flowering in cannabis plants.
Fertilizing a cannabis plant with pollen from an unrelated individual plant of the same species.
Cubic Feet-per-Minute (CFM)
Measures air velocity - ventilation or extraction fans are measured in the Cubic Feet-per-Minute (CFM) of air they can move.
Cubic Foot (or Meter)
Volume measurement in feet (or meter): width x length x height = cubic feet (or meter).
A contraction of 'cultivated variety,' a variety of plant that has been intentionally created or selected - not naturally occurring.
A thin layer of plant wax (cutin) on the surface of the aboveground parts of cannabis plants.
Dab (or Dabbing)
Fungus disease that attacks young cannabis seedlings and clones causing the stem to rot at the base - over-watering is the main cause of damping-off.
Decarboxylate (or Decarbing)
To rot or decay, etc., through organic chemical change.
To remove moisture from the air.
To remove water from cannabis plants' foliage.
To exhaust soil of nutrients, making it infertile - once the soil is used to grow a cannabis garden, it is depleted.
To cause to dry up - insecticidal soap desiccates its victims.
Liquid soap concentrate used as a wetting agent for sprays and water or a pesticide - detergent must be totally organic to be safe for cannabis plants.
A period of cannabis plant dormancy during which growth or development is suspended or diminished.
A population consisting of gynoecious and androecious plants.
A condition where separate sexes occur on separate individual cannabis plants - each plant displays a single gender.
Direct Current (or DC)
A continuous electric current that only flows in one direction.
Cannabis plant sickness of any kind.
Amount of fertilizer, insecticide, etc. given to a cannabis plant, usually in a water solution.
A two-pot transplanting technique that minimizes root disturbances.
To the empty soil of excess water - good drainage allows water to pass through the soil, evenly promoting plant growth and bad drainage is where water stands in the soil, actually drowning roots.
Drip Irrigation System
An efficient watering system that employs a main hose with small water emitters (tiny holes) which meter out water one drip a time at regular, frequent intervals.
A line around a plant directly under its outermost branch tips - roots seldom grow beyond the drip line.
Cold, white solid substance formed when carbon dioxide (or CO2) is compressed and cooled - dry ice changes into CO2 gas at room temperatures.
Dry Sieve Hash
Dry Soil Pocket
A small portion of soil that remains dry after watering - dry soil pockets may be remedied by adding a wetting agent (soap) to water and/or waiting 15 minutes between watering.
Effects (of Cannabis)
A solid electric conductor used to establish an electrical arc between contacts at either end of an High-Intensity Discharge (HID) lamp.
To grow in length - cannabis stretches from three inches (or 7.5 centimeters) to a foot (or 0.3 meters) when flowering is induced.
Bubbles of air in the transpiration stream of a cutting or cannabis clone - blocks uptake of water and nutrients.
A young plant, developing within the seed - in cannabis, an embryo is derived from a fertilized ovule.
A parasitic wasp that preys on whiteflies.
Endocannabinoid System (or ECS)
Outer protective bulb or jacket of a lamp.
Hydrated magnesium sulfate in the form of white crystalline salt - epsom salts add magnesium to the soil.
When the sun crosses the equator and day and night are each 12 hours long - the equinox happens twice a year.
Volatile oils that give cannabis plants their characteristic odor or flavor - contained in the secreted resins of plants.
Ethane Methyl Sulfonate
A mutagenic chemical that causes changes at the Deoxyribonucleic Acid (or DNA) level - induces genetic mutations.
The growth of a cannabis plant in total darkness to increase the chances of root initiation.
Etymology (of Cannabis)
First filial generation, the offspring of two P1 (parent) cannabis plants.
Second filial generation, resulting from a cross between two F1 cannabis plants.
Large, fan-like cannabis leaves - fan leaves are usually low in potency.
Pistillate, ovule, and seed producing cannabis plant.
To apply fertilizer and nutrients to cannabis plants' roots and foliage as well as to impregnate male pollen with female plant ovary.
Over-fertilization - first, leaf tips brown, then leaves curl.
A shallow container used to start cannabis seedlings or clones.
The leaves, or more generally, the green part of a cannabis plant.
Misting fertilizer solution, which is absorbed by the foliage of a cannabis plant.
Foot-Candle (or FC)
One Foot-Candle (or FC) is equal to the amount of light that falls on one square foot of surface located one foot away from one candle.
To fuse or embed nutrients with a glass compound, Fritted Trace Elements (or FTE) is long-lasting and do not easily leach out of the substrate.
A product that destroys or inhibits fungus on cannabis plants.
A lower plant (lacking chlorophyll) that may attack cannabis plants - mold, rust, mildew, mushrooms, and bacteria are fungi.
An electrical safety device made of a metal that melts and interrupts the circuit when overloaded.
Electrical circuit box containing circuits controlled by fuses.
A reproductive cell specialized for fertilization, having the haploid number of chromosomes - a mature pollen grain or ovule capable of fusing with a gamete of the opposite sex to produce the embryo.
Part of a chromosome that influences the development and the potency of a cannabis plant - genes are inherited through sexual propagation.
Collection of possible gene combinations in an available population.
The genes inherited from parent cannabis plants - genetic makeup is the most important factor dictating vigor and potency.
The specific genetic makeup of an individual, which determines the physical appearance of that individual cannabis plant.
The sum total of the genetic or hereditary materials in a species.
A class of cannabis plant growth hormone used to promote stem elongation - gibberellic acid is a form of gibberellin.
Removing a strip of bark or crushing the stem of a cannabis plant - girdling limits the flow of nutrients, water, and plant products, which can kill the plant.
A cannabis plant hair gland which secretes resin.
Insect that preys on aphids, thrips, whiteflies, etc. and their larva and offspring.
A heated structure with transparent or translucent walls and ceiling which offer some environmental control to promote cannabis plant growth.
Dung from birds, high in organic nutrients - seabird guano is noted for being high in nitrogen, and bat guano is high in phosphorus.
An individual cannabis plant having all pistillate flowers - in reference to a population, all-female.
Any of the non-metallic elements fluorine, chlorine, bromine, iodine, and astatine existing in a free state - halogens are enclosed within the arc tube of a Metal Halide (MH) lamp.
Gradual adaptation of indoor or greenhouse plants to an outside environment.
Having flowers of both sexes on the same cannabis plant - are more correctly referred to as 'intersex.'
Hertz (or Hz)
A unit of frequency that cycle one time each second - a home with a 60-hertz Alternating Current (or AC) current cycles 60 times per second.
Hybrid vigor such that an F1 hybrid falls outside the performance range of cannabis parents with respects to some character or characters - usually applied to size, the rate of growth or general vigor.
Regions along homologous chromosomes that have different alleles.
High-Cannabinoid Full Spectrum Extract (or HCFSE)
High-Intensity Discharge (or HID) Lamp
Type of lamp used in many indoor grow rooms, High-Intensity Discharge (or HID) lamps are a type of electrical gas-discharge lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tube. Various types of chemistry are used in the arc tubes of HID lamps, depending on the desired characteristics of light intensity, correlated color temperature, Color Rendering Index (or CRI), energy efficiency, and lifespan.
High-Terpene Full Spectrum Extract (or HTFSE)
Members of paired chromosomes in non-gametic cells and homologous chromosomes are similar in size, shape, and function - one of each chromosomal pair is derived from the male plant, the other from the female.
A sticky honey-like substance secreted onto foliage by aphids, scale, and mealy bugs.
The reflective cover of a High-Intensity Discharge (or HID) lamp.
The abbreviation stamped on some High-Intensity Discharge (HID) bulbs meaning they may be used in a horizontal position.
A chemical substance that controls the growth and development of a cannabis plant - root-inducing hormones help the clones root.
The science and art of cultivating cannabis plants.
Water outlet usually found outdoors that contains an on/off valve.
An environment that is unfriendly and inhospitable to pests and diseases, and/or cannabis plants.
Dark, fertile, partially decomposed plant or animal matter - humus forms the organic portion of the soil.
Greater strength and health or faster rate of growth in the offspring resulting from the cross-breeding of two gene pools.
Light, colorless, odorless, highly flammable gas - hydrogen combines with oxygen to form water.
Instrument for measuring relative humidity in the atmosphere.
The process of breeding cannabis solely within the seed lot with no external pollen inputs.
Indoleacetic Acid (or IAA)
A cannabis plant hormone that stimulates growth.
To effect, cause, or influence via stimulation - a 12-hour photoperiod stimulates flowering in cannabis plants.
Day length required to stimulate flowering in cannabis plants.
A substance that will not chemically reactive - inert growing mediums make it easy to control the chemistry of the nutrient solution.
A cluster of cannabis flowers.
A product that kills or inhibits insects.
Amount or strength of light energy per unit or area - intensity decreases the further away from the source.
A single individual cannabis plant expressing both staminate and pistillate flowers.
To incorporate or add a trait to a given population, without altering the significant characteristics of the population.
Protective outer bulb or envelope of the High-Intensity Discharge (or HID) lamp.
Kilowatt Hour (or kWh)
A measure of electricity used per hour - a 1,000-watt High-Intensity Discharge (HID) uses one kilowatt per hour.
To dissolve or wash out soluble components of soil by heavy watering.
A plant that is abnormally tall, with few leaves - usually caused by lack of light.
A series of growth stages through which cannabis must pass in its natural lifetime - the stages are a seed, seedling, vegetative, and flowering.
A device that moves a High-Intensity Discharge (or HID) lamp back and forth or in a circular path across the ceiling of a grow room to provide more balanced lighting.
Light-Emitting Diode (or LED)
Cutting off lover, secondary plant branches to encourage primary growth.
Calcium compounds such as dolomite or hydrated lime that determine or alter soil pH level.
Chemically sensitive paper used to indicate pH levels in colorless liquids.
Organic soil mixture of crumbly clay, silt, and sand.
A position on a chromosome where a specific gene is located.
Measurement of light output, one lumen is equal to the amount of light emitted by one candle that falls on one square foot (or meter) of surface located one foot (or meter) away from one candle.
One or all of the primary nutrients N-P-K (Nitrogen, Phosphorus, or Potassium) or the secondary nutrients magnesium (Mg) and calcium (Ca).
Trim leaves and large stems from buds with scissors or fine pruners so the most Tetrahydrocannabinol (or THC) potent portion remains.
Marijuana Infused Product (or MIP)
Cutting away the cannabis plants' growth tips to encourage branching and limit height.
One-millionth (1/1,000,000) of a meter.
Trace elements necessary for plant health, including sulfur (S), iron (Fe), manganese (Mn), boron (B), zinc (Zn), and copper (Cu).
Manufacture rain with a misting system or spray bottle.
An electronic device that measures the moisture content of soil or a substrate at any given point.
Producing only one color, Low-Pressure Sodium (or LPS) lights are monochromatic.
Having a male (staminate flowers) and female (pistillate flowers) reproductive systems or flowers on the same plant.
The study of the form and structure of animals and plants.
A protective covering for the soil or compost, old leaves, paper, rocks, etc. - indoors, mulch keeps soil too moist and possible fungus could result from and outdoors mulch helps the soil retain and attract moisture.
An inheritable change in genetic material.
The mass of strands that form the root-like part of fungi, often submerged in soil or a host body.
Nitrogen (N), phosphorus (P), and potassium (K) are the three major cannabis plant nutrients.
Nanometer (or nm)
One billionth of a meter (or 0.000000001 meter), nm is used as a scale to measure electromagnetic wavelengths of light - color and light spectrums are expressed in nanometers.
Necrosis (or Necrotic)
Localized death of a cannabis plant part due to injury or disease.
An essential element for growing cannabis, it is one of the three major nutrients N-P-K.
A joint on the stem or the position on the cannabis plant from which leaves, shoots, or flowers grow.
A gardening business that grows plants for sale or experimentation - a nursery is a great place to gather information about horticulture.
Plant food, essential elements nitrogen (N), phosphorus (P), and potassium (K) is called 'N-P-K' for short as well as secondary and trace elements fundamental to sustaining plant life.
Ohms Power Law
A law that expresses the strength of an electric current: Volts x Amperes = Watts.
Pollination that occurs naturally, as opposed to controlled pollination, no effect of selection from human interference.
The most favorable condition for growth and reproduction or peak production when growing cannabis
Made of, derived from, or related to living organisms - growers of organic cannabis use fertilizers and insect control methods of animal or vegetable origin - unaltered rock powders are also considered organic.
The equalizing movement of fluids through a semi-permeable membrane, such as in a living cell.
Breeding between individual cannabis plants that are not closely related.
An electrical circuit that uses more than 80 percent of its potential is overloaded - a 20 amp circuit drawing 17 amps is overloaded.
An egg which contains the female genes and is found within the plant ovary - when fertilized, an ovule will grow into a seed.
Tasteless, colorless, odorless, element - cannabis plant roots need oxygen in the soil in order to grow.
Organism that lives on or in another host organism without benefiting the host - fungus is a parasite.
Parts-per-Million (or PPM)
Hydroponic system that moves the nutrient solution through absorption or capillary action.
A disease-causing micro-organism, especially bacteria, fungi, and viruses.
Partially decomposed vegetation (usually moss) with slow decay due to extreme moisture, cold, and acidic conditions.
A plant, such as a tree or a shrub, which completes its life cycle over several years.
Amendment of sand or volcanic glass expanded by heat, which aerates the soil or growth medium.
A scale from 0 - 14 that measure a growing medium's acid to alkaline balance - a pH of 7 is neutral, lower numbers indicate increasing acidity, and higher numbers increasing alkalinity - cannabis grows best in a 6.5 to 8 pH range.
Electronic instrument or chemical used to measure the acid and alkaline balance in soil or water.
Internal fluorescent bulb coating that diffuses light and affects various color outputs.
One of the three primary macronutrients that promote root and flower growth in cannabis plants.
The relationship between the length of light and dark in a 24-hour period - affects the growth and maturity of cannabis.
The building of chemical compounds (carbohydrates that plants need for growth) from light energy, water and carbon dioxide (or CO2).
The environmental response movement of a cannabis plant toward or away from a light source.
The arrangement of leaves on a stem and the principles that govern such arrangement, phyllotactic spirals form a distinctive class of patterns in nature.
Female cannabis plant, having pistils but no functional stamens.
Fine, yellow, dust-like microspores containing male genes.
Male flowering that contains pollen.
The transfer of male pollen from the anther to the stigma of the same or a different flower to fertilize ovules which produce seeds.
A hybrid plant crossbred for more than one trait.
Polyvinyl Chloride (or PVC) Pipe
Plastic pipe that is easy to work with, readily available, and used to transport liquid and air.
One of the macronutrients necessary for plant life.
Root system that is bound, stifled or inhibited from normal growth by a too-small container.
Capable of wielding strong physiological or chemical effects - cannabis rich in cannabinoids that provides a desirable effect.
Interruption or change in the flow of electricity.
Beneficial insect or parasite that hunts down and devours harmful insects.
Belonging to or characteristic of the earliest stage of development of an organism or a part.
One born of, begotten by, or derived from another; an offspring or a descendant - offspring or descendants considered as a group.
Sexual propagation produces seed by breeding male and female cannabis plant or asexual propagation to produce a plant by cloning.
Trimming branches or parts of the cannabis plant to strengthen those that remain or brings shape to the plant.
Pull ‘n’ Snap
A tool developed by British geneticist, Reginald Punnett, used by biologists to predict the probability of possible genotypes of offspring.
Natural insecticide made from the blossoms of various chrysanthemums.
QWISO (or Quick-Was Isopropyl Hash Oil)
The part of a cannabis plant seedling that develops into a root, the root tip.
Hydroponic system that reclaims the nutrient solution and recycles it.
A mature plant, having completed its life cycle (flowering) that is stimulated by a new 18-hour photoperiod, to rejuvenate or produce new vegetative growth.
Ratio betwee the amount of moisture in the air and the greatest amount of moisture the air could hold at the same temperature.
Tiny pores that secrete resin in cannabis plants.
To moisten or soak in order to soften and separate the cannabis fibers from the woody tissue by partial rotting.
To weed out inferior, diseased, or undesirable plants from a crop, field, or population area.
The underground part of a cannabis plant - roots function to absorb water and nutrients as well as anchor a plant in the ground or to start rooting a cutting or clone.
A root-inducing substance used for cloning cannabis plants.
A crystalline compound that results from improper pH or toxic build-up of fertilizer - salt will burn plants, preventing them from absorbing nutrients.
The shoot (containing buds) that is used for grafting.
Screen of Green (or SCROG)
To scrape and roughen the surface - seeds with a hard outer shell germinate faster when scuffed.
Sea-of-Green (or SOG)
Airtight sealer for plastic baggies used to seal in the freshness of pungent cannabis.
The mature, fertilized ovule of a pistillate plant, containing a protective shell, embryo, and supply of food - a seed will germinate and grow, given heat and moisture.
A dry calyx containing a mature or maturing seed.
To fertilize with pollen from the same flower or cannabis plant; self-pollinating.
The declining growth stage in a cannabis plant or plant part from its prime to death.
Slang term for 'bunk,' lower growth or the least potent portion of harvest - small particles of cannabis broken off the main 'nug' inside a bag due to rough handling - many times, the shake is flaked or powder-like and used for cooking.
Condition that results when wires cross and form a circuit - a short circuit will trip breaker switches and blow fuses.
Used as a cleaning agent, wetting agent, or insecticide - all soap used in horticulture should be biodegradable.
Threaded, wired holder for a light bulb.
A growing medium made up of mineral particles such as vermiculite, perlite, sand, pumice, etc. - organic moss is often a component of a soilless mix.
Able to be dissolved in liquid, especially water.
A mixture of two or more solids, liquids, or gases, often with water.
Large pieces of perlite, a light, mineral soil amendment.
Seed-like offspring of certain bacteria, fungi, algae, and some non-flowering cannabis plants.
A shoot of a cannabis plant, as from a recently germinated seed or small, new growth of leaf or stem.
Square Feet (or Meters)
Length x width = square feet (or meters) - a measurement of area.
Motionless air or water - for healthy cannabis growth, water must drain and not become stagnant as well as you need good air circulation.
The cannabis male floral organ, bearing the anther, which produces pollen to fertilize female flowers.
Male, pollen-producing flower having stamens but no pistils.
To make super clean by removing dirt, germs, and bacteria; disinfect pruning tools to avoid spreading disease.
The tip of the cannabis flower's pistil, which receives the pollen.
One of a pair of small, leaf-like appendages found at the base of the leaf-stalk of many cannabis plants.
The tiny holes can be found on the underside of the cannabis leaf (and just about every other plant). They’re called 'stomata' and they require a microscope or at least a magnifying glass to see. Small mouth-like or nose-like openings on leaf underside, responsible for transpiration and many other life functions - the millions of stomata must be kept very clean to function properly.
A physical or chemical factor that causes extra exertion by plants, usually by restricting fluid flow to foliage - a stressed plant will grow poorly.
The medium on which cannabis plants grow, like soil, soilless mix, rock, etc.
The food product of a cannabis plant.
A reservoir that receives drainage; a drain or receptacle for hydroponic nutrient solutions used for growing cannabis.
A common name for fertilizer high in phosphorus (P) and potassium (K) that promotes cannabis flower formation and growth.
Super-Critical Botanical Extractor
Tape that is extremely useful to help seal all kinds of threaded pipe joints.
Lukewarm water 70 - 80 F (21 - 27 C), always use tepid water around cannabis plants to facilitate chemical processes and ease the shock.
Tetrahydrocannabinol (or THC)
Tetrahydrocannabivarol (or THCV)
Tetrahydrocannabivarol (or THCV) is a psychoactive chemical found in cannabis. As its name suggests, THCV is similar to Tetrahydrocannabinol (or THC) in molecular structure and psychoactive properties, but it provides a variety of pronounced and altogether different effects.
A device for regulating temperature, a thermostat may control a heater, furnace, or vent fan.
An electrical device for regulating photoperiod, fan, etc., a timer is a must in all cultivation operations.
The amount of time a pesticide or fungicide remains active or live.
A device in the ballast that transforms electric current from one voltage to another.
To give off water vapor and by-products via the stomata on cannabis leaves.
A frame of small boards that trains or supports cannabis plants, a trellis is a framed screen or net with a lattice pattern. It can be positioned vertically or horizontally to maximize available grow space and light penetration in any cannabis garden. This allows the grower to dramatically increase yields.
Having three sets of chromosomes within each cell may contribute to increased vigor.
A heavy, hard metal with a high melting point that conducts electricity well, tungsten is used for a filament in tungsten halogen lamps.
Ultraviolet (or UV)
Light with very short wavelengths, out of the far blue visible spectrum and is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.
A distinct cannabis strain or phenotype.
Referring to a cannabis plant's circulatory system which carries sap throughout the body of the plant.
An organism (as an insect) that transmits disease, a pathogen, or an organism that transmits genes, a pollinator.
An opening such as a window or door that allows the circulation of fresh air in cannabis cultivation.
Circulation of fresh air, fundamental to a healthy indoor garden, an exhaust fan creates ventilation.
A soil amendment and medium for root cuttings, vermiculite is a hydrous phyllosilicate mineral and it undergoes significant expansion when heated. Exfoliation occurs when the mineral is heated sufficiently, and the effect is routinely produced in commercial furnaces. Vermiculite is formed by weathering or hydrothermal alteration of biotite or phlogopite
Vitamin that is absorbed by tender root hairs, easing transplant wilt and shock.
Waxes and Lipid Fats
A compound that reduces the droplet size and lowers the surface tension of the water, making it wetter, so a liquid concentrate dish soap is a good wetting agent if it is biodegradable.
Three or more leaves or branches located at each node along the cannabis plant branches and stems, people often confuse the term whorled phyllotaxy with the condition, triploidy (a chromosomal anomaly).
The part of a passive watering system the nutrient passes up to be absorbed by the medium and roots, a passive hydroponic system uses a wick suspended in the nutrient solution.
To become limp from lack of water or a cannabis plant disease or disorder.
Paper-coated wire ties are excellent for tying down or training cannabis plants.
Vascular tissue that transports water and minerals from the roots throughout the cannabis plant stems and leaves.
Zero-Zero (or Hash)
Top-quality, first-sieve hash.