Cannabis regular
Herb · warm season · also called photoperiod cannabis, marijuana, weed, hemp
When to plant
- Start seeds indoors about 4 weeks before planting out.
- Plant outdoors about 2 weeks after your average last spring frost.
- Ready to harvest about 145 days after planting out.
Photoperiod: grows leaves all summer and flowers when nights get long, so it is ready in fall no matter when you plant. Regular seed is about half male: pull males when they show pollen sacs if you want seedless flower. Can reach 6+ ft; top or train it to keep it lower. Estimate is dried flower.
Frost dates depend on where you live. Enter your ZIP code to get exact dates.
Dates by zone: 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b
Growing basics
Harmful to pets. Toxic to cats and dogs. Eating it causes stumbling, drowsiness, and vomiting.
- Sun
- Full sun (6+ hours)
- Spacing
- 3–5 ft
- Soil temperature
- At least 60°F
- Time to harvest
- About 145 days
- Containers
- At least 10 gallons
- Plant family
- Hemp family (cannabis)
- Harvest per plant
- About 0.75 lb
- Seeds keep
- About 3 years
Companions
Keep apart: Horseradish. Horseradish spreads aggressively. Give it its own spot.
Keep apart: Mint. Mint spreads aggressively into neighbors. Keep it in a pot.
Keep apart: Fennel (bulb). Fennel slows the growth of most garden plants. Grow it on its own.
Keep apart: Sunchoke (Jerusalem artichoke). Sunchokes spread aggressively and shade neighbors.
Grow it well
Affiliate links: we may earn a small commission, at no extra cost to you.