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Cosmos Seeds, Cosmic Orange
Description
(Cosmos sulphureus). Enjoy fantastic tangerine tones for minimal effort with this easy-to-grow annual! This stellar selection won the 2000 All America’s Select Flower Award for its vivid orange color, vigorous, care-free growing habit, and long season flowering. The blooms are 2 inches in diameter, with double and semi-double petals, and sit atop 1- to 2-foot tall plants. A sure bet to bring a bevy of pollinators to the garden.
- Annual
- 50-60 days to maturity
- 6-8 hours of full sun
- Sprouts in 7-14 days
- Seed Depth: 1/8-1/4"
- Plant Spacing: 10"
- Ideal Temperature: 65-85 F
- Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
Cosmic Orange cosmos is drought tolerant, heat resistant, and low maintenance, making it perfect for beginner gardeners. Deadhead regularly to encourage blooming from midsummer until the first frost. The plants prefer poor or moderate soil.
When to Grow
Cosmos should be planted after the last frost when soil temperatures reach at least 60 F. In regions with short growing seasons, start seeds 3-4 weeks before the last expected frost and transplant them outdoors once the weather has warmed. In warm climates, cosmos should be sown in place mid-spring. To find 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.’
How to Sow and Plant
Press the seeds lightly into the soil 1/8-1/4 inch deep but do not cover heavily, as cosmos require light to germinate. Space plants about 10 inches apart to allow for good air circulation. Keep the soil evenly moist until seeds germinate, typically within 7-14 days. If starting indoors, transplant seedlings outdoors only once they are strong enough and the weather has warmed. Be careful when transplanting to avoid disturbing the roots.
How to Grow
Cosmos thrive in full sun, requiring at least 6-8 hours of direct sunlight daily. Avoid excessive fertilization, as it can cause leafy growth instead of flowers. Once established, cosmos are drought tolerant and require minimal watering. Overwatering can lead to weak stems and fewer blooms. If plants become too tall or leggy, trim them back by one-third for bushier growth.
How to Save
- 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.
FAQ
Do I need to deadhead Cosmic Orange cosmos?
Yes, regular deadheading (removing spent flowers) encourages continuous blooming.
Can I grow Cosmic Orange cosmos in containers?
Yes, it can be grown in containers; choose deep pots with well-draining soil and avoid over fertilizing.
Are Cosmic Orange cosmos plants deer resistant?
Yes, cosmos are generally deer resistant, but in areas with heavy deer populations, they may still be nibbled occasionally.
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