Free Cannabis Growing Tools & Calculators
Everything you need to grow better cannabis, all in one place. These free interactive tools help you pick the right strain, dial in your grow environment, estimate yields, plan a feeding schedule, and calculate costs — no sign-up required.
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Strain Selection Tools
Strain Finder Quiz
Answer a few quick questions about your preferences and get personalized strain recommendations tailored to your needs.
Strain Comparator
Place two strains side by side and compare THC, CBD, effects, flavors, and grow difficulty at a glance.
Terpene Explorer
Browse the most common cannabis terpenes, their aromas, and the effects they contribute to each strain.
Growing Tools
Yield Calculator
Estimate your harvest weight based on grow space, lighting, and plant count.
Grow Light Calculator
Calculate the DLI and PPFD your plants need and find the right light intensity for every growth stage.
Nutrient Deficiency Identifier
Select your plant's symptoms and get a likely diagnosis with corrective steps.
Dry & Cure Timer
Set up a drying and curing countdown so you never rush or forget a jar burp.
Grow Schedule Planner
Generate a week-by-week grow timeline from germination through harvest for any strain.
Planning Tools
Track Your Results with GrowGuide
Get AI plant diagnostics, grow journals, yield tracking, and personalized recommendations — all free.