A Cannabis Growers DictionaryMarch 27, 2019
New growers can often get lost in the slang and terminology. I find that a Cannabis Growers Dictionary would be very useful. Though here at Percys Grow Room, we try and make things as simple as possible for a new grower to follow, using abbreviations and slang terms can’t be helped sometimes.
Here is a cannabis growers dictionary of slang and terminology used by growers. This will help you understand the meaning of some of these terms.
Cannabis Growers Dictionary
18/6: Time normally associated with the vegetative stage of growth i.e. 18 hours of light to 6 of darkness.
24/0: Lighting on constantly with no dark period.
12/12: Timing used to initiate the flowering stage of a cannabis plant indoors. For example, 12 hours light and 12 hours darkness.
Aeroponics: Growing of plants in a container in which the roots are suspended in a nutrient mist rather than in a solution.
Auto: A cannabis plant that will flower under any light cycle. It will veg and flower within a set time period, and the growth cycle can not be extended.
Ballast: Provides current and power to the light for HID bulbs. Can be digital, or magnetic.
BG EC: Background Electro Conductivity, the EC of your water before adding any nutrients.
Blood Meal: Organic fertilizer that is very high in nitrogen and is soluble in water (unlike most other dry organic fertilizers).
Buds: The flowers of a female cannabis plant. They contain high concentrations of THC and other cannabinoids.
Cannabinoids: Chemical compounds that naturally occur in the resin of the cannabis plant.
Canopy: The top level of a plant, where the light has most contact with the leaves.
CBD: The 2nd most prevalent cannabinoids found in the cannabis plant, and it is emerging as a promising therapy for many illnesses.
CDM/CMH: Ceramic Discharge Metal Halide grow lighting.
CFL: Compact Fluorescent Lamp, grow light.
CFM: Cubic Feet per Minute. This describes the volume of air that is displaced in 1 minute in your grow room.
Chlorophyll: The green pigment in leaves. Chlorophyll captures the suns energy which is used to manufacture sugar from carbon dioxide and water.
Cloning: The process of replicating female plants, by cutting off branches and rerooting them.
COB: Chips On Board, a type of LED lighting.
Colas: The main female flowers on a cannabis plant. They are bigger and longer than buds on side branches.
Composting: The process by which organic materials are broken down and decomposed in specific conditions to create a nutrient-rich medium.
Cotyledons: The small round leaves that are the first to appear on a cannabis seedling.
Cuttings: Parts of a cannabis plant that have been removed for the purpose of cloning. See Also – Cloning
Decarboxylation: Wet THC dries and loses a CO2 molecule, which then makes the THC psychoactive.
DWC: Deep water culture, a very popular way of growing cannabis hydroponically, where roots are submerged in reservoirs of water.
EC: Electrical Conductivity, the conductivity of water will increase with the amount of salts added. EC is the measurement how many salts are in your water
F1: First generation clone, a clone taken from a mother plant grown from seed.
Fan leaves: The large leaves that grow off branches.
Feminized Seeds: Seeds which have been bred to ensure a high chances of a female plant.
FIM: A variant of the topping technique, where only a portion of the growth tip is removed, instead of the whole top. This can cause an increase in cola sites. (See topping).
Flush: The act of pouring water through a plants medium, or changing the reservoir. This is done to remove nutrients and contaminants from the medium.
Foliar Feeding: Spraying the plants with water and/or nutrients to feed the plant nutrients through the leaves.
Flowering: When a cannabis plant grows it flowers, i.e buds.
Germinate: When a seed has reached the ideal conditions to start its life cycle.
GLR: Gas Lamp Routine, this is a type of lighting schedule that can reduce energy costs.
GPW: Grams per watt, how many grams of dried flower you yield from the wattage of your grow light.
Harvesting: When a cannabis plant is ripe and finished, the plant will be chopped down.
HID Lighting:High Intensity Discharge (lighting)
HPS: High Pressure Sodium lights. This light has a red/orange spectrum that is ideal for the flowering phase.
HST: High Stress Training, techniques such as topping, or super cropping. Where high amounts of stress are exerted onto the plant.
Hormone:A biochemical product of a specific cell or tissue that causes a change or activity in a cell or tissue located elsewhere in an organism.
Hydroponics: Growing plants in a medium like water, clay pebbles, rockwool or perlite and vermiculite mixture.
Humus: A complex material formed during the breakdown of organic matter.
Hybrid: Often refers to a plant or variety that has been developed by interbreeding two or more varieties, species, or genre.
kWh: Measurement of power, how many kilowatts used in one hour.
LEC: Light Emitting Ceramic (lighting- see CMH).
LED: Light Emitting Diode, grow lighting.
Light-burn:When the heat from a light burns the plant.
LST: Low-Stress Training, the technique of manipulating the branches in order to reduce plant height to expose more branches to light.
Lumens: A measurement of light intensity.
Macronutrients: Carbon, hydrogen, and oxygen (which are all three derived from air and water); and nitrogen, phosphorus, potassium, calcium, sulfur, and magnesium (through the roots).
Micronutrients: Manganese, boron, copper, iron, chlorine, cobalt, molybdenum, and zinc.
Medium : A soil or soil-less mix, where the roots of a cannabis plant will sit.
MH: The Metal Halide grow light. A HID bulb with a blue spectrum of light.
Necrosis: Death of parts of the plant, usually refers specifically to the leaves.
NFT: A hydroponic irrigation technique where a shallow stream of water containing nutrients is circulated past the roots of plants in a watertight channel.
Node: The point on a stem where leaves and branches shoot from.
NPK: Nitrogen is N, Phosphorus it’s P, Potassium it’s K. All three of these elements are essential for plant growth.
Nuits: Nutrients or fertilizer.
Nuit-burn – The side effects of over feeding a cannabis plant.
Organic Nutrients: Natural, non-synthetic nutrients.
PAR: Photosynthetic active radiation, how much light in a spectrum a plant can actually use for photosynthesis.
Peat moss: The partially decomposed remains of mosses harvested commercially from the wild.
Perlite: A volcanic mineral which is used to help drainage in mediums.
PH: The measure of acidity or alkalinity. Water is usually around neutral at PH 7. PH levels below 7 are classified as acidic,, whilst levels above 7 are alkaline. Most plants prefer a slightly acidic Ph (soil 6.5, hydro 5.8)
Phenotype: The characteristics the plant shows, by expressing certain genetics from its mother, and father.
Phloem: Nutrient conducting tissue.
Photo: A plant that requires 12 hours of light, and 12 hours of darkness to begin the process of flowering
Photoperiod: AKA lighting schedule. The number of hours of light and darkness the plant is exposed to.
Photosynthesis: Biochemical process in which light energy is absorbed by chlorophyll, and is used to fuel the building of sugar molecules.
Pistil: A white hair-like protrusion from the nodes/buds of a female plant. Pistils turn from white to brown as the buds mature.
PPM: Acronym for Parts Per Million, this term is used most in hydroponics to measure the amount of nutrients in your feed.
RDWC: Recirculating Deep Water Culture, similar to DWC, but many plants share one reservoir, with water cycling around them all.
Re-vegging: When a flowering plant or clone is exposed to more than 14 hours of light, and it begins vegetative growth again.
RES: Reservoir, where your nutrients or water are stored for auto feeding of your plant, or hydroponics growing.
RH: Relative Humidity, how much moisture is in the air in your grow room
RO: Reverse Osmosis, the process of filtering water to extract all minerals and contaminates out of it.
Rock Wool: Blocks or slabs of rock wool are used by hydroponic growers.
RSO: Rick Simpson oil, a form of cannabis oil used for medicines.
Root Bound: Where a plants roots have outgrown the pot and has no room to grow. This will result in stunted plants. The solution is a larger pot or transplanting outdoors.
Ruderalis:Ruderalis is the cannabis variety that has been bred with indica and sativas to create autoflowering strains.
Run Off: The water that leaves the bottom of the medium after watering your plants.
Sativa: You can identify a Sativa by its long, slender, finger-like leaves. A Sativa will typically produce a euphoric, energetic, cerebral high.
ScrOG: Screen of Green, growing plants under a horizontal net, or frame, to keep the canopy level. Used mostly by indoors growers to increase light absorption.
SOG: Where many plants are grown together in a small space
Sensimilla: – Spanish for ‘without seed’, AKA sensi, having a female plant bud without letting a male plant pollinate it, thereby preventing seeds from forming in the buds. This increases THC potency and smokable bud weight.
Strain: Specific genetics of the plant. Example: White Widow, Northern Lights.
Stomata: The pores on a leaf, these will open and close to control plant perspiration,
Stress: Any unhealthy stimuli the plant receives. Examples: Light-burn, overwatering, nute-burn. Stress can cause slow growth, mutations, or death.
Synthetic Nutrients: Concentrated and industrial-made nutrients.
T5: Fluorescent tube lighting with ideal spectrum for seedlings/Vegetative growth
THC: Tetrahydrocannabinol, is the primary intoxicant in marijuana and hashish.
Tip Leaves: The small leaves that grow in the buds of the plant, usually covered in trichomes when harvested.
Topping: A method used to increase yield and reduce height, by removing the top shoot of a cannabis plant during veg.
Trichomes: AKA crystals, are tiny, mushroom-shaped glands full of cannabinoids that form on the flowering buds and bud leaves of cannabis.
Vermiculite: Vermiculite is added to the soil to increase water and nutrient retention and aeration
Veg: Vegetation, the cannabis plants growth period before the flowering stage
Ventilation: – Air movement and extraction to provide the plant with fresh air and/or to reduce the temperature in the grow area.
Watts: A measure of the amount of electricity flowing through a wire. Watt hours measure the amount of watts used in one hour. A kilowatt/hour (KWH) is 1000 watt/hours.
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