growers glossary

aeroponics n - a technique for growing plants without soil or hydroponic media where the plants are held above a system that constantly mists the roots with nutrient solution
acclimate v - to habituate to a climate not native
acidic adj - relating to or containing an acid; having a pH of less than 7
air conditioner n - an apparatus for controlling, especially lowering, the temperature and humidity of an enclosed space
alkaline adj - relating to or containing an alkali; having a pH greater than 7
annual n - a plant that completes its entire life cycle within the space of a year
aphid n - Any of various small, soft-bodied insects of the family Aphididae, with mouthparts specially adapted for piercing and feed by sucking sap from plants, that excrete a honeydew and live on the undersides of foliage; about the size of a pin head, they may be green, yellow, black, or pink and with or without wings
atmospheric controller n - a device that coordinates CO2 enrichment cycles with ventilation cycles by monitoring temperature and humidity, activating ventilation at user determined preset points and deactivating CO2 enrichment
auxin n - a plant hormone that promotes root formation and bud growth

ballast n - HID lighting component, necessary to its operation, consisting of a transformer core and a capacitor, and with HPS fixtures an electronic starter
beta-phalandrene n - essential oil of the cannabis plant partly responsible for its aroma
biological pest control n - the use of natural predators to control or eradicate plant pests
blower n - a device that uses electricity to produce a current of air to ventilate an area
branch n - a division of a stem, or secondary stem arising from the main stem of a plant
breed n - A group of plants having common ancestors and certain distinguishable characteristics, especially a group within a species developed by artificial selection and maintained by controlled propagation; v - To produce offspring
breeding v - To cause to reproduce, especially by controlled mating and selection; To develop new or improved strains in (organisms), chiefly through controlled mating and selection of offspring for desirable traits
bud n - a swelling on a plant stem consisting of overlapping immature leaves or petals; v - to force to flower
budding adj - The stage or condition of having buds; v - the act of forcing a plant to produce flowers
bulbous trichome n - spherical resin producing gland with no stalk found on the epidermis of the cannabis plant

calcium (Ca) n - a secondary plant nutrient that functions as a coenzyme in the synthesis of fatty compounds and cell membranes and is instrumental in adjusting the soils chemistry or pH
calyx n - the sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing a developing bud; usually green
cannabinoids n - any of several compounds with 21 carbon atoms, including THC, cannabinol, and cannabidiol, produced by the cannabis plant and stored in its resin glands
cannabis n - hemp; annual dioecious plant having alternate, palmately divided leaves and tough bast fibers; any of several mildly euphoriant, intoxicating hallucinogenic drugs, such as ganja, hashish, or marijuana, prepared from various parts of this plant; genus belonging to the family Moraceae
carbohydrate n - any of a group of organic compounds, including sugars, starches, celluloses, and gums, that are produced by photosynthetic plants and contain only carbon, hydrogen, and oxygen, usually in the ratio 1:2:1
carbon dioxide (CO2) n - a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis
cellulose n - a complex carbohydrate, (C6H10O5)n, composed of glucose units, that forms the main constituent of the cell wall in most plants
circulation n - the movement or flow of air within a grow room
cfm - acronym for cubic feet per minute; measurement of the speed at which a device can move air
chlorosis n - the yellowing or whitening of normally green plant tissue because of a decreased amount of chlorophyll, often as a result of disease or nutrient deficiency
clone n - An organism descended asexually from a single ancestor
cola n - term used to refer to the dense mass of flowers produced at the tops of the branches of a cannabis plant
compost n - a mixture of decaying vegetation and manure; used as a fertilizer v : convert to compost, as of organic debris
cultivate v - foster the growth of
cutting n - a small branch removed from a plant to propagate a new plant through rooting or grafting

damp rot or damping-off n - a fungal disease, developing in small clones or seedlings, caused by overly damp, humid conditions, characterized by softening and necrosis of the tissue at the base of the stem, and most often resulting in wilting, loss of ability to support the plant, and death.
dioecious n- a plant species that has male and female flowers on seperate plants. Cannabis is normally dioecious.
dissolved solids meter n - device used to measure the amount of dissolved nutrients in a solution drip system n - hydroponic gardening system that utilizes a pump to deliver nutrient solution from a reservoir to drip emitters placed above the growing medium, which is either saturated several times a day or continuously and drains back into the reservoir

ebb and flow or flood and drain n - hydroponic gardening system that utilizes a pump to draw nutrient solution from a reservoir and flood the growing medium, which drains back into the reservoir, several times a day
EC meter n - acronym for Electrical Conductivity meter; used to measure the EC of a solution to determine the amount of nutrient in a solution
environment n - the totality of the surrounding conditions in the area in which something exists or lives; the combination of external physical conditions that affect and influence the growth, development, and survival of organisms
Epsom salt n - chemical compound (MgSO4) dissolved in water and applied to growing medium or foliage to treat Magnesium or sulfur deficiencies
exhaust n - the foul air let out of a room through a register or pipe provided for the purpose; v - to draw out the contents of
exhaust fan n - a fan that moves air out of an enclosure

fan n - a device for creating a current of air by movement of a surface or surfaces
fermentation n - the anaerobic conversion of sugar to carbon dioxide and alcohol by yeast
fertile adj - capable of reproducing; Bearing functional reproductive structures such as seeds or pollen
fertilize v - provide with fertilizers or add nutrients to; make fertile or productive; impregnate
fertilizer n - Any of a large number of natural and synthetic materials, including manure and nitrogen, phosphorus, and potassium compounds, which are used to support plant growth.
flower n - The reproductive structure of some seed-bearing plants, characteristically having either specialized male or female organs or both male and female organs, such as stamens and a pistil, enclosed in an outer envelope of petals and sepals; That part of a plant destined to produce seed consisting of two essential parts, the stamens and the pistil, and two floral envelopes, the corolla and calyx; v - to blossom or ripen; to develop naturally fully or mature; forcing a plant to blossom or ripen using artificial means
flowering n - The act of blossoming, or the season when plants blossom;
flowering cycle n - the phase of a cannabis plants life cycle that begins when it first expresses its sex and continues until harvest
fluorescent lamp n - a light source consisting of a tube coated on the inside with a fluorescent material such as phosphor; electricity is arced between two electrodes and inert gases in the tube emit ultraviolet radiation that is converted to visible radiation by the fluorescent material
foliage n - the main organ of photosynthesis and transpiration in higher plants; A cluster of leaves
foliar feeding n - a method of providing nutrients to a plant by misting the leaves with a nutrient solution
fungicide n - a chemical agent, such as copper, lime sulfur, that destroys fungi
fungus n - a parasitic plant lacking chlorophyll and leaves and true stems and roots and reproducing by spores; plant disease characterized by mushy, rotting spots on the leaves that can be purple, black, or brown in color, causes necrosis of plant tissue, weakening of stems and affected tissue, and death, treated by lowering humidity and application of fungicide, such as copper, lime, or sulfur, to the affected area
gene n - a self-replicating protein molecule that occupies a fixed place on a chromosome; a unit of heredity
generation n - group of genetically related organisms constituting a single step in the line of descent
genetic adj - of or relating to or produced by or being a gene; tending to occur among members of a family usually by heredity
genetic drift n - the tendency for random fluctuations in the frequency of the appearance of a gene or genes to occur in a population of plants, particularly when cloning is repeated on each successive generation of clones, getting further form the original mother plant, resulting in an unstable genetic make-up and morphological abnormalities
germinate v - to cause a seed to sprout
greenhouse n - a building, with glass or plastic walls and roof, used to shelter and cultivate plants under controlled conditions
growing medium n - any of a number of substances such as soil, rockwool (see rockwool), perilite, etc that is used as a substrate to support and provide a plant with nutrients

hard water n - water that contains high concentrations of salts and minerals
harvest n - the yield from plants in a single growing season; v - to gather crops or yields.
hermaphrodite n - A species that displays both male and female flowers on the same plant.
H.I.D- acronym for High Intensity Discharge; describes a family of light fixtures, including mercury vapor, high pressure sodium, and metal halide lamps, that produce light by arcing electricity through various gases
high pressure sodium n - lighting fixture that produces light by passing electricity through vaporized sodium and mercury within an arc tube
hood n - a device used with an HID lighting fixture which directs the light down on the plants
hormone n - a substance, usually a peptide or steroid, produced by the plant to effect physiological activity, such as growth or metabolism
humid adj - containing or characterized by a great deal of water vapor
humidifier n - A device for increasing the humidity in a room, greenhouse, or other enclosure
humidity n - wetness in the atmosphere
humidity dome or tent - clear plastic or glass enclosure placed over a plant or garden to hold in water vapor and increase humidity
hybrid n - an offspring of genetically dissimilar parents or stock; adj - produced by crossbreeding
hybridize v- to breed plants using parents of different varieties; to crossbreed
hybrid vigor n - Increased vigor or other superior qualities arising from the crossbreeding of genetically different plants
hydroponics n - cultivation of plants in nutrient solution rather than in soil; aquiculture
hygrometer n -any of a number of devices used to measure the relative humidity of the atmosphere

inbreeding n - the act of mating closely related individuals; To breed by the continued mating of closely related individuals, especially to preserve desirable traits in a stock
insecticide n - a chemical used to kill insects
intake n - an opening by which a fresh air is admitted into an indoor grow room

lacewings n - any of various insects of the super family Hemerobioidea, having four gauzy wings, threadlike antennae, and larvae that feed on insect pests such as aphids
leaf n - the main organ of photosynthesis and transpiration in higher plants
leaf spot n - fungus that appears as necrotic spots or blotches on foliage, and is caused by temperature stress and(or) high humidity
light cycle n - term used to describe the amount of light and darkness a pant is receiving in a given period of time i.e. 12 on - 12 off, 18 on - 6 off, 18 on -12off, etc
light meter n - device used to measure luminescence or intensity of light
light mover n - device that moves a lamp(s) around above the garden to more evenly distribute the intense light directly under the bulb
lime n - (also called quicklime) any of various mineral and industrial forms of calcium oxide differing chiefly in water content and percentage of constituents such as silica, aluminum, magnesium, and iron, applied to the soil to raise pH or to treat magnesium or iron deficiencies
limonene(s) n - A liquid, C10H16, with a characteristic lemon like fragrance, used as a solvent, wetting agent, and dispersing agent and in the manufacture of resin
lumen(s) n - a measurement of light intensity equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions
magnesium deficiency n - plant disease resulting from lack of magnesium or excesses of Ca or Cl; characterized by chlorosis between the veins of the leaves at the top of the plant, leading to necrosis and curling of the blades
marijuana n - A preparation made from the dried flower clusters and leaves of the cannabis plant, usually smoked or eaten to induce euphoria
mealy bugs n - scale-like, 2-7 mm oblong plant-eating insects, coated with a powdery, waxy secretion, that live in colonies and attack the cannabis plant at the stem joints
mercury vapor n - light fixture that produces light by arcing electricity through mercury and a small amount of argon gas
metal halide n - light fixture that produces light by passing or arcing electricity through vaporized argon gas, mercury, thorium iodide, sodium iodide, and scandium iodide within a quartz arc tube
mold n - a fungus that produces a superficial growth on various kinds of damp or decaying organic matter; plant disease characterized by mushy, rotting spots on the leaves and stems that can be purple, black, or brown in color, causes necrosis of plant tissue, weakening of stems and affected tissue, and death, treated by lowering humidity and application of fungicide, such as copper, lime, or sulfur, to the affected area
monoecious n - A plant that has both male and female flowers on the same plant. Marijuana can be monoecious sometimes but is not favourable.
morphology n - the branch of biology that deals with the structure of animals and plants; The form and structure of an organism or one of its parts
mylar n - a thin, highly reflective polyester film
myrcene n - essential oil of the cannabis plant partly responsible for its aroma
necrosis n - the localized death of living cells in a plant characterized by dried, brown, and crusty spots on vegetation
negative ion generator n - device that produces negative ions to clean the air and neutralize odor
neutral adj - having only a limited ability to react chemically; not active; having a pH of 7
nitrogen (N) n - a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues; one of three major nutrients used by the cannabis plant to synthesize amino acids, proteins, chlorophyll, DNA, enzymes, and hormones; purchased as a nitrate in fertilizer
nitrogen deficiency n - plant disease resulting from lack of enough nitrogen, characterized by uniform chlorosis of the leaves beginning at the bottom of the plant, slow growth, and some wilting
node n - the point on a stem where a leaf is attached or has been attached; a joint
NPK - acronym for Nitrogen Phosphorous Potassium; labeled as percentages of content in fertilizer such as 3-5-3, 20-10-10, 12-27-15, etc
nutrient n - a source of plant nourishment; any of the a number of chemicals and compounds such as nitrogen, potassium, phosphorous, calcium, magnesium, etc. required for plant growth
nutrient deficiency n - plant disease resulting from lack of enough of one or more of the necessary plant nutrients
nutrient solution n - fertilizer containing chemical compounds dissolved in water

outbreeding n - The breeding of distantly related or unrelated individuals, often producing a hybrid of superior quality
ovary n - The ovule-bearing lower part of a pistil that ripens into a fruit
over-fertilization n - plant disease, characterized by slowed or stunted growth, wilting, chlorosis, and necrosis of the foliage, caused by toxification of the growing medium, due to an overabundance of chemicals
over-watering n - plant disease resulting from excessive moisture in the growing medium around the roots; characterized by root rot, damp rot, wilting, and slow or stunted growth
ovule n - A minute structure in seed plants, containing the embryo sac and surrounded by the nucleus, that develops into a seed after fertilization
oxygen (0 ) n - a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 28 percent of the atmosphere by volume; the most abundant element in the earth's crust; essential for plant and respiration; Atomic number 8; atomic weight 15.9994; melting point -218.4°C; boiling point -183.0°C; gas density at 0°C 1.429 grams per liter; valence 2.
ozonator or ozone generator n - device that produces ozone (O3) to purify the air and neutralize odor

perilite n - sand or volcanic glass, expanded by heat, used as a planting medium
pesticide n - a chemical used to kill pests (as rodents or insects)
pH n - a measure of the acidity or alkalinity of a substrate or solution, numerically equal to 7 for neutral, increasing with increasing alkalinity and decreasing with increasing acidity. The pH scale commonly in use ranges from 0 to 14
phosphorus (P) n - a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; one of three major nutrients used by the cannabis plant as a primary component in the synthesis of molecular complexes such as genes, and is necessary to the development of energy transfer compounds, which are required for photosynthesis and respiration
photoperiod n - The duration of a plants daily exposure to light and darkness, considered especially with regard to the effect of the exposure on growth and development
photosynthesis n - the process in green plants by which carbohydrates are synthesized from carbon dioxide and water vapor using light as an energy source, releasing oxygen as a byproduct;
pistil n - The female, ovule-bearing organ of a flower, including the stigma, style, and ovary
pollen n - The fine, powder like material consisting of pollen grains that is produced by the anthers of seed plants; fine grains contain male gametes
pollinate v - To transfer pollen from an anther to the stigma of (a flower).
potassium (K) n - a light soft silver-white metallic element of the alkali metal group; one of three essential plant nutrients used by the cannabis plant for certain plant processes, such as photosynthesis, respiration, and uptake of nutrients to occur, which has been linked to a healthy infrastructure, growth, and resistance to disease
potency n - capacity to produce strong physiological or chemical effects
ppm - acronym for Parts Per Million; measurement used to determine the amount of dissolved chemicals in a solution as in nutrients in water
propagate v - to cause to continue or multiply by generation, or successive production
pruning v - to cut off or remove dead or living parts or branches of a plant to improve shape or growth; trimming a plant
regeneration n - the act of forcing a plant to revert to the vegetating state after it has been flowered and harvested
relative humidity n - the ratio of the amount of water in the air at a give temperature to the maximum amount it could hold at that temperature; expressed as a percentage
resin n - viscous substances, containing THC and other cannabinoids, obtained as exudations from the leaves, flowers, and stems of the cannabis plant
resin gland n - tiny clear, white, or amber structure, covering the surface of the leaves, buds, and stems of a flowering cannabis plant, that secrets a viscous substance containing THC and other cannabinoids
respiration n - the process of taking in oxygen from the air and releasing carbon dioxide
ripe adj - fully developed or matured and ready to be harvested
ripen v - to cause to become fully developed or matured
rock wool n - a light fibrous material made from molten rock and used as a substrate in hydroponic gardening
root n - the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground; v - to grow roots or a root; to cause to put out roots and grow
root ball n - dense clump of roots and growing medium
rooting hormone n - substance used by the plant to induce and promote root growth and development
root rot n - plant disease resulting from over-watering and lack of oxygen; characterized by browning and damp rot of the roots causing slow or stunted growth and wilting

seed n - A ripened plant ovule containing an embryo
seeded adj - Containing seeds; filled with seeds
seedling n - young plant grown from a seed
sequence timer n - a device used to control the frequency and duration of the operation of various indoor gardening equipment such as CO2 regulators, ventilation fans, and water or nutrient pumps.
soil n - the top layer of the earth's surface, consisting of rock and mineral particles mixed with organic matter
spectrum n - an ordered array of the components of an emission or wave as in the color spectrum of visible light
spider mite (tetranychid) n - a yellow, white, brown, red or two-spotted web-spinning mite, too small to be distinguished by the naked eye, that attacks cannabis plants, spinning a fine web-like due and feeding on the underside of the foliage
sprout n - any new growth of a plant such as a new branch or a bud 2: a newly grown bud (especially from a germinating seed) v - produce buds, branches, or germinate
stabilized hybrid n - plant hybrid that, through a program of inbreeding, consistently produces similar offspring
stamen n - the male reproductive organ of a flower, consisting of the anther and filament,
responsible for secreting and furnishing pollen
stem n - a slender or elongated structure responsible for supporting a plant or a plant part or plant organ and delivering nutrient from the roots to the plants infrastructure
strain n - The collective descendants of a common ancestor; a race, stock, line, or breed; A group of progeny of the same species, having distinctive characteristics but not usually considered a separate breed or variety
stigma n - the apical end of the style where pollen is deposited; The receptive apex of the pistil of a flower, on which pollen is deposited at pollination
stomata n - minute pores in the epidermis of a leaf or stem through which gases and water vapor pass
style n - The usually slender part of a pistil, situated between the ovary and the stigma
substrate n - the medium in which a plant grows
sulfur (S) n - a secondary plant nutrient which is a constituent of certain amino acids, proteins, and vitamins, and is necessary for respiration and metabolism
taproot n - main root of a plant growing straight downward from the stem
temperature n - the degree of hotness or coldness of the environment (corresponding to its molecular activity)
terpene(s) n - Any of various unsaturated hydrocarbons, C10H16, found in essential oils and oleoresins of plants such as conifers and used in organic syntheses
THC n - acronym for tetrahydrocannabinol (C21 H30 O2); a carbon compound obtained from cannabis or made synthetically, that is the primary intoxicant in marijuana and hashish
thermometer n - a device for measuring temperature
thermostat n - a device that automatically regulates temperature by activating switches that control heating or cooling equipment
timer n - device that activates or deactivates electrical equipment at set times
topping n - pruning the newly developing buds (leaves) from the tips of branches or shoots causing the plant to begin developing two new branches at the first node down from the top left un-pruned
training n - gardening technique, used by growers to increase yields or alter plant stature v - causing a plant to take a desired course or shape by manipulating it; bending over and securing the top of the plant and(or) its branches for short periods to control height and force branching
trace elements n - plant nutrients, needed in very small amounts, important to the plants biochemistry, particularly in coenzymes and catalysts; they are iron (Fe), zinc (Zn), copper (Cu), manganese (Mn), boron (B), and molybdenum (Mb)
transplant n - a plant that has been uprooted and replanted; v - to uproot, move, and replant a plant in new location or container
trellis n - a structure of latticework used to support climbing plants
trichome n - a hair-like gland on the epidermis of a cannabis plant
vegetate v - To grow or sprout as a plant does
vegetating cycle n - the phase of a cannabis plants development that begins at germination and ends when flowering begins
vegetative adj - composed of vegetation
vegetation n - plant life; v - The act or process of vegetating, or growing as a plant does
vent n - an opening for the escape of gas or air
ventilation n - the act of supplying fresh air and getting rid of foul air; a system in a location that provides fresh air
vermiculite n - any of a group of micaceous hydrated silicate minerals related to the chlorites and used in heat-expanded form as insulation and as a planting medium
viable adj - Capable of living, developing, or germinating under favorable conditions; Capable of success or continuing effectiveness

whitefly n - small whitish homopterous insect of the family Aleyrodidae, having long, moth like wings and a white waxy body around 1mm long, often injurious to plants foliage
wick system n - hydroponic gardening system that utilized capillary attraction to draw nutrient solution, from a reservoir below the plant, into the growing medium
wilt n - any plant disease characterized by drooping and shriveling; v - become limp
and drooping
yield n - the usable amount of produce harvested from a plant