Seed Pests

Marijuana Horticulture

by Jorge Cervantes

Seed pests become active when there is more than ten percent moisture content. When the growing mediums contains more than fifteen percent moisture, fungi become active. Excess fertilizer slows seedling growth and promotes fungus attacks.

Temperatures from 68-85F promote Pythium (damping-off) and rhixoctonia fungi. Cannabis seeds grow best at 78F. Most fungi reproduce fastest in a temperature range of 68-86F.

Keep a wary eye on problems. Nutrient overdose burns leaf tips and fringes, which can look like damping-off to the untrained eye. Do not fertilize. Applying a fungicide now will make the problem worse.