Blue Dream and Durban Poison are both go-to daytime sativas, but one is a vigorous, easy-grow hybrid and the other a pure African landrace. Here is how they…
Cannabis Growing Blog
Gelato 33 and Runtz share the same Cookies-and-Gelato dessert heritage, so they look and smell like cousins, but they grow and hit a little differently. Here is the…
Hardening off is the process of slowly moving a tender clone from the warm, humid life under a dome to normal room conditions, and for outdoor growers, to…
Deep Water Culture, or DWC, grows cannabis with the roots hanging in oxygen-rich nutrient water instead of soil. An air pump feeds a stone that keeps the solution…
Vapor pressure deficit is the single most useful environmental number in a grow room, and it is also the one most growers get wrong. Temperature and humidity on…
Cannabis tissue culture, also called micropropagation, grows new plants from tiny tissue samples placed in sterile agar gel inside sealed containers. It produces clean, pathogen-free stock at scale,…
Rooting hormones are auxin compounds, mainly IBA and NAA, that trigger cuttings to grow roots faster and more reliably. You apply gel, powder, or liquid to a freshly…
Nutrient lockout happens when the nutrients your cannabis plant needs are present in the medium but the roots cannot absorb them, almost always because the pH has drifted…
Genotype is a cannabis plant's genetic code, the fixed DNA it inherits. Phenotype is how that code actually expresses under real conditions: the height, color, aroma, and yield…
Short answer
Calcium and magnesium deficiency shows up as rust colored spots on leaves (calcium) or yellowing between the veins while the veins stay green (magnesium). It is…