Coreopsis Seeds,
Incredible Swirl

Incredible Swirl coreopsis should be planted in warm weather after the last frost. Start seeds 6-8 weeks before your region's last expected frost date. Maintain a soil temperature of around 70 F for germination. Alternatively, you can direct sow seeds in late spring when the soil has warmed and the danger of frost has passed. Learn more about your region's frost dates by checking out our blog post, 'Our Experts Answer Questions, Share Resources.'

Sow the seeds directly on the surface of the soil, as they need light for germination. Lightly press them into the soil but avoid covering them. Indoors, use a seed-starting tray or small pots with a well-draining seed-starting mix. Outdoors, prepare a well-draining garden bed in a sunny spot. Keep the soil moist during germination. Be sure to harden off seedlings and ensure they are well-established before transplanting. Space seedlings about 10 inches apart.

Coreopsis thrives in full sun with at least 8-12 hours of sunlight per day. It grows best in well-drained, sandy or loamy soils but will tolerate poor soil conditions. Avoid waterlogged areas, as coreopsis does not tolerate standing water. Once established, coreopsis is drought-tolerant and requires minimal watering. Cutting back burned-out plants will create another flush of blooms. Avoid over-fertilizing, as this can lead to excessive foliage growth and fewer flowers.

• Coreopsis are insect-pollinated and there may be some crossing between varieties in the garden. You can enjoy the mixing or use caging techniques and hand pollination to avoid crossing.
• Saving seed from coreopsis is easy: simply allow the heads to brown and dry on plants and collect seeds. Store in a cool, dry, dark place over winter.