Coreopsis Growing Guide
Growing Coreopsis is easier than you think. This guide walks you through everything you need — from planting your first seed to harvesting.
At a Glance
Difficulty
Easy
Category
Flower
Sun Exposure
Full Sun, Partial Sun
Frost Tolerance
Frost Hardy
Growing Zones
Zones 3, 4, 5, 6, 7, 8, 9
Plant Family
Asteraceae
Growing Season
Warm Season
Plant Lifecycle
Perennial
Also grows well as
When To Start
First Chance to Plant
30 Days Before Last Frost
Last Chance to Plant
30 Days Before First Frost
When should you plant Coreopsis?
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Your Coreopsis Planting Window
Start planting
May 15, 2026
Last chance
Sep 10, 2026
The Journey Ahead
Coreopsis's Lifecycle
Seedling
Mature Plant
Seed Production
Step 2
Planting & Sprouting
Expect sprouts in 10–20 days
Growing Tips
- 1Plant Coreopsis in a spot with full sun to ensure vibrant blooms.
- 2Water them moderately, allowing the soil to dry out between waterings to prevent root rot.
- 3Use well-draining soil and space plants about 12 to 18 inches apart to promote good air circulation and reduce the risk of disease.
- 4For pest control, keep an eye out for aphids and use insecticidal soap if needed.
Seedling Phase
Step 3
Growth & Maturity
~70
Days to Maturity
60 cm
Mature Height
45 cm
Mature Width
Pests to Watch For
Diseases to Watch For
Mature Plant
Step 4
Harvesting
Harvest Window
45 days
When to Pick
Cut flowers when fully open
How to Harvest
- 1Harvest Coreopsis flowers when they are fully open and vibrant in color.
- 2Use sharp scissors or pruning shears to cut the stems just above a leaf node or set of leaves to encourage new growth.
- 3Avoid pulling the stems to prevent damaging the plant.
Step 5
Saving Seeds
How to Save Seeds
Saving seeds from your Coreopsis plant is easy and rewarding! Once the flowers have faded and the seed heads turn brown and dry on the plant, simply snip them off and gently break them open to collect the tiny seeds inside. Let the seeds air dry for a few days on a paper towel, then store them in a labeled envelope or small jar in a cool, dry place until you’re ready to plant again. You’ve got this—saving seeds is a simple way to keep your garden growing year after year!
Seed Production
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Grow Coreopsis from seed.
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