Grow Tools
Interactive tools for cannabis cultivation — from VPD calculations to environment optimization.
Identify Nutrient Deficiencies
Click on a nutrient for symptoms, affected plant parts, and remedies.
N
Nitrogen
MacronutrientLower leaves turn light green, then yellow
P
Phosphorus
MacronutrientDark green to purple leaves
K
Potassium
MacronutrientBrown, burnt leaf edges
Ca
Calcium
MacronutrientNew leaves deform, edges turn brown
Mg
Magnesium
MacronutrientInterveinal chlorosis (veins green, surface yellow)
Fe
Iron
MicronutrientYoung leaves turn completely yellow/white
Zn
Zinc
MicronutrientSmall, twisted new leaves
pH & Nutrient Availability
Move the slider and see how pH affects nutrient uptake.
6.2
Optimal Range (5.8–6.5)
Availability