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Flowers · tender annual
Ageratum from seed
Ageratum houstonianum
- Germination temperature
- 70 to 80°F (21 to 27°C)
- Sowing depth
- surface
- Days to germinate
- 7 to 10 days
- Light
- Needs light: press onto the surface
- Before sowing
- Nothing needed
- Start indoors
- 6 to 8 weeks before planting out
- Plant out
- 1 to 2 weeks after the last frost
- Spacing
- 9 to 12 in (23 to 30 cm)
Your dates from your last frost Seed not coming up?
Sowing
Johnny's: 7 to 10 days at 75 to 80°F; sow 6 to 8 weeks before planting out. Direct sowing is not recommended.
Care and transplanting
Plant out after frost and deadhead for more bloom.
Problems
Cold stalls plants badly.
Saving seed
Hybrids are not reliable from saved seed.