The following is a list of terms commonly used in the growing community:



  • The small football-shaped pods that make up a female bud. Two to three pistils will grow from each as they mature. If pollinated, a seed will grow inside.


  • A diverse group of chemical compounds found in abundance in cannabis. There are 113 known cannabinoids, each with their own effect and use. THC, CBD, CBD-A are all examples of cannabinoids.

Chlorosis (Yellowing)

  • A complete yellowing of the leaf due to lower than normal amounts of chlorophyll. When the veins are green and the area between the veins are yellow, this is termed as interveinal chlorosis. If just the edges of the leaf are yellowing, this is termed as marginal chlorosis. 


  • Cloning is taking cuttings from healthy female plants still in the vegetative cycle. This method enables you to get multiple plants that are genetically identical to the 'mother' plant. This is preferred by many growers because the results are predictable.


  • Coir, or coconut fiber, is a natural fiber extracted from the outer husks of coconuts. The coco pods used in a Grobo is made up of coir. 

Cola / Main Cola

  • A cola is a bud site of a cannabis plant. Healthy plants usually form one main cola from the center of the branching structure with smaller colas forming around the outside. The central main stem of the plant (i.e. the main cola) will become the largest flower. 


  • Curing is the weeks-long process of slowly removing moisture from buds under controlled environmental conditions to create a better quality product with more cannabinoids. Click HERE to see Grobo's curing video

Cutting (Unrooted Clone)

  • A piece of a cannabis plant cut from a 'mother' plant for the purpose of propagation.

Deep Water Culture

  • A hydroponic method of growing where a plant's roots are suspended in a bath of water made up of air bubbles and nutrients.

EC (Electrical Conductivity)

  • EC, or electrical conductivity, means the potential of any material to conduct electricity. In the context of a deep water culture system, when we add nutrients (salts) to the water, we increase the conductive potential for current through water, thus increasing EC. So, think of EC as a reading for how concentrated your grow's water is.

Fan Leaves


  • A seed that has been bred to be a female plant. Females produce the flowers (i.e. buds) and males pollinate them with seeds.


  • The stage where buds start to appear at the nodes of the plant.


  • This process refers to pouring large amounts of clean water through the grow medium in order to remove as much nutrient build-up as possible. Often done when changing cycles, or, before harvest.




  • A plant that grows both male and female parts and thus creates pollen and eventually seeds. There are two types of hermaphrodites: genetic and stressed. The latter is more common and happens when a plant is abnormally stressed.
  • Help! I think my plant has become hermaphroditic


  • A plant that has a combination of Sativa, Indica, or ruderalis plant genes mixed together.


  • A method of growing without soil by using mineral nutrient solutions in a water solvent.


  • This species of cannabis is known for its intense body high and pain relieving qualities. It has thicker leaves, grows more compact and shorter.

IPM (Integrated Pest Management)

  • A broad term meaning 'Integrated Pest Management,' this refers to the program a grower creates to manage or prevent pest outbreaks. 


  • A pruning technique that helps your plants focus their energy in their biggest bud sites. It's easy, low-stress, and it can help you produce a greater harvest.
  • When should I lollipop my plant?


  • The core nutrients your plant needs. Examples: Nitrogen, Phosphorus, and Potassium. 


  • In addition to the macronutrients, micronutrients are also needed for healthy plant growth. Smaller amounts of these nutrients are required, however. Examples: Calcium, Magnesium, and Zinc. 

Node / Internode

  • The internode is the spacing between the fan leaves and branches, while the node is where the leave and branches connect to the main stem. This is the space that will eventually fill in with buds. 

PPM (Parts Per Million)

  • A measurement of a mass in a liquid, similar to TDS. This is a way of determining the concentration of salt in water or soil. This is used for very small concentrations of particles in solutions, as one ppm equals to 1 milligram of salt per liter of water (mg/l). 

pH (Potential of Hydrogen)

  • A measure of the acidity or alkalinity of your water or soil. Having the optimal pH in your growth medium is important as pH greatly affects your plant’s ability to take in nutrients
  • How long does a pH probe last for?


  • Different plants that are grown from the same batch of seeds. Each will show different genetic traits that are inherited from one or both of the parent strains. Many growers will grow a batch of seeds and choose the 'best' phenotype from the group (i.e. the one with the genetics they want). 



  • The female organs of a flower that includes the stigma, style, and ovary

Root Rot


  • Another species of cannabis. Ruderalis is less common and produces less THC. Other defining features are its slightly different leaf shape, shorter height, and faster flowering cycle. This species is sometimes crossed with other cannabis to take advantage of these characteristics. 


  • This species of cannabis is associated with a cerebral, energetic, 'head high.' Sativa strains have longer flowering times, narrower leaves, and can grow to be very tall. They are often crossed with indica or ruderalis varieties to help offset their tall and lanky stature. 


  • A female flower that has not come in contact with any male pollen, so it has no seeds.

Showing / Sexing

  • When the plant is mature enough to start budding on it's own, it will begin to sprout calyxes or pods. These indicate the sex of the plant (i.e. male or female). This is referred to as showing, showing sex, or sexing. 

Sugar Leaf


  • It's the main root of a root system that grows vertically downward.


  • Terpenes are organic compounds that provide aroma and flavor in cannabis. 
  • What are terpenes?

TDS (Total Dissolved Solids)

  • Another way to measure how many solids are in your water solution. Similar to PPM. Dissolved solids can be organic sources such as leaves, plankton, sand, or salts. It could also be materials such as nitrogen, calcium, sulfates, or other minerals.



  • This is the process of gently bending the plant and tying it with restraints to open the lower canopy of the plant to light. This is very common in smaller indoor grows when space is limited. It can stress your plant, so, it's best practice to give your plant at least 1 week of no pruning or training to let it recover. 

Trichomes / Trichs

  • The tiny hairs with bead-like crystals on the end are plentiful as a plant matures and ripens. These trichomes are the resins produced by the plant that contains most of the cannabinoids, including THC. Magnification using a microscope is required to see its colouring up close. 
  • What are my trichomes colors telling me?

Vegetative Stage

  • The growth stage of the plant's life. After roots are established, 18 - 24 hours of light per day enable the plant to grow bigger and taller.