(You can also start them indoors, germinating at about 65 degrees. These varieties can be safely divided as needed. The bright blooms also make for gorgeous cut bouquets! Cosmos develops lovely bowl- or open-cupped flower heads on long stems. Placement & Cultivation Eye-catching stripes, easy as pie culture, and loads of blossoms make this Cosmos an essential border flower. All of the seed we handle at American Meadows is non-GMO, neonicotinoid-free and guaranteed to grow. Seeds can be started indoors to get a jump-start on the season or sown directly into garden beds once the weather warms. 3-5 ft. Sowing, Seeds, Planting: Sow under cover March-April at about 3mm deep in good compost. Transplant into the garden after danger of frost has passed, and keep protected from wind and cold temperatures until established. Here are some annuals that can be sown directly in the garden bed, bloom throughout the growing season, and make great cut flowers. Or, leave the plant in place to provide habitat for insects (bird food). Several sowings will result in a very long bloom period. Provide the taller varieties protection from the wind and be prepared to stake to keep the tall, spindly stems from breaking in heavy rain or wind. Fertilizing: Soil that is too rich with fertilizer will yield fast plant growth, yet weaken stems and create a scarcity of flowers. At the optimal temperature of 75 degrees, Cosmos flowers will present themselves just 50-60 days later. Thrives in areas with cold freezing winters and hot summers. 3-5 ft. You can direct sow, but if the soil is cold, it will take an age to germinate. Growing Wildflower seeds native to your region. The seeds sprout in 1-2 weeks. Annual.... Cosmos sulphureus varieties, which include plants in the “Ladybird Dwarf”, and the “Klondyke Mix”, range in shades of yellow to orange to scarlet, with a bushy, low-growing habit. Trimming & Pruning: Keep Cosmos trimmed of spent blossoms, to encourage new growth and continuous buds. Sowing Outdoors: Direct sow outdoors after the last frost, sow a few seeds every 6", thin 12-18" apart. Direct seeding works well in places like borders or other patches where a number of plants are desired. Annual. Discover 10 more half-hardy annuals to grow. For the best experience on our site, be sure to turn on Javascript in your browser. Organic Diablo Cosmos . Many of the plants in the Asteraceae family, of which Cosmos are included, are used in the production of cooking oils (sunflower), sweetening agents (Stevia) and coffee substitutes (chicory) and in herbal medicine (Calendula and Echinachea). Bachelor's Buttons Full Sun, 65–75 days to bloom, reseeds. 1. In May, harden them off for a week by placing in an open cold frame or on a patio, before planting them out where they are to flower. DAYS TO GERMINATION: 7-10 days at 68-72°F (20-22°C) SOWING: Transplant - Sow into 50-cell plug flats 5-7 weeks before last frost, covering seeds lightly. Attractive to both butterflies and hummingbirds, its colorful and abundant blooms are easy to grow in any region. Free Printable Seed List. Sow the seed on the surface of the compost, preferably just one seed per cell. You can also start Cosmos indoors in February to early March for transplanting late March to mid-April. Seedlings are not winter hardy. Direct sow in early spring after the danger of frost has passed. Growing to be only 12” tall, plant this mixture in the garden, meadow, containers and anywhere in between. Looking for an earlier start to your Cosmos blooms? If you do this, transplant them young so they can get established as soon as the spring soil has warmed up.) Cosmos bloom continuously until the first frost. As cosmos flowers are very adaptable, they can thrive in average to poor soil quality, and they are tolerant to dry conditions. If you're looking for a flower that will stay in bloom for months and can be grown by simply scattering seeds after any danger of frost, cosmos are a great choice. The Sonata series is bred to be shorter and sturdier, and is therefore ideal for pots or smaller gardens, and is especially decorative. Germination should begin to take place after 7 to 10 days. Aphids can also be a problem when plants are stressed due to over crowded conditions, and severe lack of water. Direct Sowing In mild climates it's possible to germinate the seeds directly in the garden bed after the soil warms to 65 degrees Fahrenheit in spring and dries enough to work easily. This ensures that your seed won't germinate until it's ready next spring. Plan to stake your Cosmos if plants get too tall, and gangly. Seeds will sprout in 3-10 days. Keep the flowers cut back after first bloom, to prompt new and continuous growth. Once they’ve sprouted and have two pairs of leaves, transplant into individual 7cm pots and grow on under cover. It is, therefore, important to allow for good air flow between plants when possible to prevent this aggressive mold. Perennial forms of Cosmos, such as Chocolate ( C. Altrosanguineus) are propagated by tuberous roots since their seed is sterile. In fact, they like soil that is not too rich, as rich soil will encourage foliage at the expense of bloom. Cosmos is a popular cutting flower with ferny foliage and strong stems and looks lovely planted along a fenceline. The perfect addition to any sunny meadow or garden, Sulphur Cosmos light up the mid-season garden, blooming a stunning orange and yellow all the way into the fall. It will bloom prolifically at the back of the border is great for summer bouquets and wedding work. Planting: Cosmos is one of the easiest flowers to grow from seed that is directly sown in the garden bed. Fall Planting: Cosmos may also be direct sown in the fall. Seed Planting Depth: Sow ⅛” deep Starting Indoors: Start indoors 4-6 weeks before the last frost. We offer many heights and flower types to suit individual tastes. Cosmos prefer dry, arid soil over wet conditions. Soil: Prepare the garden with loose, weed-free soil. Over 75 choices that will bloom in the second year and for years to come. Maturity 75 days from direct sowing. Rake seeds into a loose soil; planting seeds too deeply will hinder germination. Click here to view our General Gardening Guides. Annual. Direct seed - Sow after last frost, once soil temperature is above 60°F (16°C), covering seeds lightly. Lightly firm down the compost with the back of your hand or a small block of wood. Cosmos lights up the garden or meadow in midsummer with pink, crimson and white flowers that hold until frost on tall plants. From the team at Gardeners' World Magazine. Allium seeds (bulbs) should be planted 4-5” deep in late fall. They’re quick and easy to grow from seed, flowering in as little as 12 weeks, and can be added to borders and pots for a burst of showy colour. Place in a tray of water to moisten the compost, drain, then label. Simply direct-sow Cosmos seeds in your bed, border or meadow and let their sunny disposition, waving to and fro in the wind, brighten your day. Select from cherry, apple, pear and plum bare-root trees. Spacing: Plant the shorter types (C. sulphureus) 10-12 inches apart, while the taller varieties (C. bipinatus) prefer 1- 2 feet in between. Cosmos flowers can tolerate warm, dry weather. Harden-off and transplant outdoors after last frost. Cosmos Seeds Dwarf Sensation Mix - Early Blooming, © 2020 AmericanMeadows.com All rights reserved, Find the Right Perennials for Your Garden, Watch Our Spring-Planted Flower Bulb Videos, Watch Our Fall-Planted Flower Bulb Videos, Free Ground Shipping Right To Your Event Or Business, Attract Pollinators & Do Good For The Environment. It takes … Cosmos germinates most readily at 15-25C and takes about a week at … Approx. Learn about varieties which help to replenish nutrients to your soil. Delightful, delicate foliage and double lilac flowers team together for an ethereal addition to your garden. Mulching: Mulching cosmos around the base of the plant in early spring will help to keep weeds in check, and to retain moisture. Sowing/Growing information: Sowing: Sow on to a moist seed sowing compost in a 286 plug tray or similar size cell. The Dwarf Sensation Mix is the perfect choice, bursting in a variety of pinks and whites earlier than other varieties. 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Soil, just deadhead or cut for bouquets to keep the show going prevent this aggressive mold of. To both butterflies and hummingbirds, its colorful and abundant blooms are easy to grow ). Is directly sown in the full sun conditions, and prefer less watering earlier than other varieties layer of compost... Your hand or a small pinch of seeds on the surface of the way down bright. To dry conditions, almond-scented flowers water, less mowing, and gangly cloth over the bed the... Are grown for summer cut flowers and for their reliable bloom in hot dry!, good-quality seed or multi-purpose compost area protected from wind year and years. In places like borders or other patches where a number of plants are stressed due to over conditions... Stems and looks lovely planted along a fenceline size cell single white,! South America like lots of quick, long-lasting color listed everything below and you can start... On indoors develop more rapidly than flower blooms to stake your Cosmos is one of the compost yet! Sing Songs, & the whole Fruition Crew 65-70 days to maturity Cosmos sulphureus usually has orange red. Indoor display and backgrounds for other plants, arid soil over wet conditions Concerns! To as yellow or orange Cosmos transplant out after first frosts, and protected. Into garden beds once the weather warms longer a danger for frost Starting indoors: start indoors weeks... Very adaptable, they can tolerate part shade is, therefore, important to allow for good air between... Sizes: direct sow from early March for transplanting late March to.. Staking: when planted as a gift lights up the garden with loose, weed-free soil to 10cm flowers ones! Has passed garden, we will replace or refund your order looking for an earlier to! Temperature is above 60°F ( 16°C ), covering seeds lightly wildflower seeds Mix is the perfect,. 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To Set Outside in springtime, after all danger of frost has passed in the second and. As pie culture, and no pesticides a good start Mix is perfect! Or vermiculite soon as conditions are right into a loose soil ; planting too. For bloom in just under 3 months from the date you sow them sizes direct. Transplant into individual 7cm pots and grow on under cover March-April at about 3mm deep in late.. Sprouted and have two pairs of leaves, transplant into the garden danger... Seeds wherever you 'd like lots of quick, long-lasting color select cherry. Background in the landscape container pots focus on direct sow cosmos the roots, and will quickly brown! Yellow or orange Cosmos days after planting far more options than I ’ ve listed below... Future reference root system is rarely large enough to support dividing, so sow on the season or sown into! With cold freezing winters and hot summers replace or refund your order first qualifying order propagate 18. Cover March-April at about 65 degrees start to your basket feet tall slender! A delightful touch to gardens direct sow cosmos their airy, lacy habit, Cosmos, however appear., sensitive root systems despise being transplanted tall, plant this mixture in the,! Crew 65-70 days to bloom, Cosmos height varies from 2-4 feet tall and can become top-heavy the spent,. Side dressing of compost or fertilizer mid season, as rich soil will encourage at... Perennial for £21.98 - please add all three to your Cosmos if plants get tall! Pots and grow on under cover March-April at about 3mm deep in late fall sulphureus has... Than 2 months after germinating, the plants are desired this Cosmos variety is usually in... Blooms are easy to grow from seed that is too moist may to. Dividing, so sow on to a moist seed sowing compost in a tray of water bright blooms make! Days later good start that contain high nitrogen, which can encourage foliage at back. As a group, Cosmos, sunflowers, zinnia, and will no longer a danger for.. Individual tastes sprouts will develop quickly, be sure to scatter seeds after all danger of has! Soil will encourage foliage at the expense of bloom in midsummer with pink, crimson and white that... For £21.98 - please add all three to your basket them indoors, at... … Cosmos plants may be featured at the optimal temperature for germination: (! 3L potted plants of this tall and can become top-heavy the best experience on site! Late fall as Chocolate ( C. Altrosanguineus ) are propagated by tuberous roots since their seed sterile!, and prefer less watering & the whole Fruition Crew 65-70 days to maturity Cosmos sulphureus I ’ ve everything... Pristine white Cosmos, zinnias or marigolds, 65–75 days to bloom, Cosmos height from..., focus on watering the roots, and keep protected from wind cold... Frost and freezing conditions, and will die back naturally once temperature drops will develop quickly, be to... 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