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Starting Cleome (Spider Flower) from Seed Indoors

First time starting cleome from seed indoors for perennial garden. Need hints: 6 weeks before transplant, but how much light, what temperature?

Cleome Indoor Seed Starting

Critical: don't use a windowsill—spring sun is too weak, causes legginess. Use 40W shop light 8 inches above seedlings. Keep soil moist, cover with clear plastic. 10 hours light/day at 70°F for germination. After sprouting, drop to 60-65°F for compact growth. Harden off 7 days after last frost (shaded, protected spot). Then plant out.

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