Cosmos
Flower · warm season
When to plant
- Sow seeds outdoors about 1 week after your average last spring frost.
- Ready to harvest about 75 days after planting.
Thrives in poor soil. Attracts hoverflies and lacewings.
Frost dates depend on where you live. Enter your ZIP code to get exact dates.
Dates by zone: 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b
Growing basics
Not edible.
- Sun
- Full sun (6+ hours)
- Spacing
- 12 in
- Soil temperature
- At least 60°F
- Time to harvest
- About 75 days
- Containers
- At least 2 gallons
- Plant family
- Lettuce and daisy family
- Seeds keep
- About 3 years
Grow it well
Tips
- Snip off faded flowers. Zinnias, cosmos, marigolds, and other annual flowers keep blooming longer if you cut off the old flowers before they set seed.
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