Cosmos Seeds,
Apricotta

Cosmos should be direct sown after the last frost when soil temperatures reach at least 60 F. In cooler climates, seeds can be started indoors 3-4 weeks before the last expected frost and transplanted outdoors once the weather has warmed. To determine the best planting time check your local area's frost dates. If you're not sure how to do that, consult our blog post 'Our Experts Answer Questions, Share Resources.'

Sow seeds directly in the garden at a depth of 1/8-1/4 inch but do not cover heavily, as cosmos need light to germinate. Space seeds about 10 inches apart to ensure proper air circulation. Keep the soil evenly moist during germination. If starting indoors, transplant seedlings outdoors once they are strong enough and the weather has warmed. Be careful not to disturb the roots during transplanting.

Cosmos thrive in full sun and prefer well-draining, moderately fertile to poor soil. Once established, cosmos are drought tolerant and need only occasional watering. Overwatering can lead to weak stems and fewer blooms. Taller plants may need staking in windy areas. If plants become too tall or leggy, trim them back by one-third to promote bushier growth.

• Cosmos 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 seeds from cosmos is easy: simply allow the heads to brown and dry on plants and collect seeds. Store in a cool, dry, dark place over winter.