Quick Answer

Cannabis growing takes 3 to 5 months from seed to dried flower. The steps: check state law, pick seed or clone, germinate, plant, run 18/6 light in veg, switch to 12/12 for flower, harvest when trichomes turn cloudy, dry 7 to 10 days, then cure 2 to 4 weeks. Federal law bans cannabis cultivation in the US. State rules differ.

how to grow cannabis outdoors legal

Step 1: Confirm Legality

US federal law lists cannabis as a Schedule I drug. Cultivation is illegal under federal law. 24 states plus DC allow adult-use cannabis as of 2024. Check your state and county rules. Some states cap plant counts at 3 to 12 plants per household.

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Step 2: Choose Seed or Clone

Seeds cost $5 to $20 each. Clones cost $10 to $25. Clones match the mother plant. Seeds carry genetic variation. Female seeds cost more than regular seeds. Autoflower seeds skip the light change.

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Step 3: Germinate

Place seeds between wet paper towels. Keep at 70 to 80°F. Keep dark. Taproot appears in 24 to 72 hours. Plant the seed 0.5 inch deep with the taproot down.

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Step 4: Plant in Medium

Use soil, coco coir, or hydro. Soil pH: 6.0 to 6.5. Coco pH: 5.8 to 6.2. Hydro pH: 5.5 to 6.0. Water when the top inch of soil feels dry. Seedlings need 200 to 400 PPFD.

Step 5: Vegetative Stage

Run lights 18 hours on, 6 hours off. Temperature: 68 to 82°F. Humidity: 60 to 70 percent. Feed nitrogen. A veg stage lasts 3 to 8 weeks. Top the plant at 4 to 6 nodes to make two main stems.

Step 6: Flowering Stage

Switch lights to 12 hours on, 12 hours off. Flowering starts in 7 to 14 days. Flowering lasts 8 to 11 weeks. Humidity: 40 to 50 percent. Temperature: 65 to 80°F. Feed phosphorus and potassium. Stop nitrogen.

Step 7: Harvest

Check trichomes with a 30x to 60x loupe. Clear trichomes mean early. Cloudy trichomes mean peak THC. Amber trichomes mean more CBN. Cut the plant at the base. Hang branches upside down.

Step 8: Dry

Keep the room at 60 to 70°F. Humidity: 45 to 55 percent. Dry 7 to 10 days. Stems snap when dry. Buds lose 75 percent of their weight.

Step 9: Cure

Put buds in glass jars. Fill jars 75 percent. Burp jars twice a day for the first week. Then burp once a week. Cure 2 to 4 weeks. Cure improves taste and smoothness. Store in a dark place at 60 to 70°F.