Cannabis glossary

Photosynthetically Active Radiation (PAR) is the range of light wavelengths that plants use for photosynthesis, typically 400-700 nanometres.

Peat is a natural material formed from decomposed organic matter, commonly used as a growing medium for cannabis cultivation.

Perlite is a lightweight, volcanic glass used in horticulture to improve drainage and aeration in growing media.

Definition: pH is a measure of how acidic or basic a substance is, ranging from 0 (strongly acidic) to 14 (strongly basic).

Photoperiod 12/12 refers to a lighting cycle used to initiate flowering in cannabis plants by providing 12 hours of light and 12 hours of darkness.

A photoperiod of 18/6 is a lighting schedule used in cannabis cultivation, providing 18 hours of light and 6 hours of darkness daily.

PPFD is the number of photons in the 400–700 nm range that reach a square metre per second, crucial for plant growth.