Cannabis auto
Herb · warm season · also called autoflower, autoflowering cannabis, marijuana, weed, hemp
When to plant
- Sow seeds outdoors about 2 weeks after your average last spring frost.
- It can also be grown as a fall crop, timed back from your first fall frost.
- Ready to harvest about 80 days after planting.
Flowers on its own schedule, about 10–12 weeks from seed, whatever the day length. Sow straight into its final pot or spot: autos stunt if transplanted. A second crop can go in by midsummer. Harvest when most pistils have darkened; dry slowly for 7–10 days. 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
- 24–36 in
- Soil temperature
- At least 60°F
- Time to harvest
- About 80 days
- Containers
- At least 3 gallons
- Plant family
- Hemp family (cannabis)
- Harvest per plant
- About 0.15 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
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