Grow guide
How to grow Cosmos Rubenza
Cosmos bipinnatus
- Type
- Cosmos
- Zones
- USDA zones 2–11
- Sun
- Full
- Time to harvest
- 75–90 days
- Spacing
- 9″ apart
- Density
- 4 per sq ft
- Habit
- Upright
- Frost tolerance
- Tender
- Sowing
- direct/transplant
- Start indoors
- 4 weeks before last frost
- Succession
- Every 21 days
Care
- Harvest Weekly
- Deadhead As needed
- Pinch As needed
Notes
Single blooms open deep ruby then fade to terracotta with age; 3-4' plants may need staking in exposed sites.
More cosmos varieties
Grows well nearby
Track Cosmos Rubenza from seed to harvest with Evengrow.
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