Grow guide
How to grow Ageratum Tall Blue Planet
Ageratum houstonianum
- Type
- Ageratum
- Zones
- USDA zones 2–11
- Sun
- Full
- Time to harvest
- 84–105 days
- Spacing
- 9″ apart
- Density
- 4 per sq ft
- Habit
- Upright
- Frost tolerance
- Tender
- Sowing
- Start indoors, then transplant
- Start indoors
- 6 weeks before last frost
- Succession
- Every 14 days
Care
- Water Weekly
- Fertilize Biweekly
- Deadhead As needed
Notes
F1 cut flower ageratum with vivid blue pom-pom clusters on tight upright 24-30" stems; a reliable blue filler from Johnny's breeding program.
More ageratum varieties
Grows well nearby
Track Ageratum Tall Blue Planet from seed to harvest with Evengrow.
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