Cosmos are a beautiful, low maintenance edible annual flower that attracts birds, butterflies and bees to your garden. Flowers come in an amazing variety of bright colors and unique styles.
The Cosmos flower (Koz-moss) is an annual flowering plant grown for their showy daisy-like flowers often planted as background plants.
Cosmos is a heat loving plant and grows and flowers well at temperatures above 60F. Temperatures below 55F inhibits growth & flowering.
Space plants 9-12″ apart and use support netting especially if windy. Sequential planting every 2 to 4 weeks will result in better quality flowers. To encourage long stems, pinch early to the first set of nodes or wait until the are about 18″ and use hedge trimmer to shear to 10-12″ for better branching.
Harvest from colored bud thru when petals are on first flower are just beginning to open but have not yet flattened for fresh cut flowers. Vase life is 4 to 6 days with water and can be extended with floral preservatives.
Varieties / Cultivars
Antiquity – 24″; Burgundy flowers open and mature to bronze salmon creating a lovely, two-tone effect. Very floriferous all summer for borders, containers & cutting.
Capriola – 2 ft; Large bicolor flowers with broad petals. White background with purple-red center ring and rosy-red picotee edge around entire petal. Early. For borders, landscaping, container accents and cut flowers.
Casanova Series – 10″ containers, 24″ garden; Very compact, bushy, branching and uniform. Large 2.5-3.5″ flowers. Pink, Red, Violet & White.
Cosimo Series – 18-20″; Early & compact with unique bi-colors and collarettes. striped pink & white, Purple Red and bi-color striped red & white.
Cosmix Series – 10″ container, 24″ garden; Very large 3″-4″ flowers with compact habit.
Cupcakes – Cup-shaped blooms. Fused petals form a single cupped shaped flower resembling a poppy.
Cutesy – 24″; semi-dwarf, mounding habit with large flowers. carmine, pink, pink blush and white.
Double Click Series – 24″-30″. Very floriferous, informal mum-like doubles with strong stems. Long flowering period. Bicolor Pink, Bicolor Violet, Cranberries, Rose BonBon & Snow Puff.
Fizzy Series – 3 ft; Showy semidouble flowers. Rose Picotee
Gazebo (Vega) Series – 2 ft; Strong stems, compact, freely branched w’ fernlike leaves, large bright flowers. Red & White.
Happy Ring – 4 ft; Bicolor, shell-pink, cherry-ringed center. Long wiry stems.
Hot Pink – 10″ container, 24″ garden; Large 2.5″-3″ flowers. Striking hot cerise pink color.
Lovebird Series – Fluted, ‘Seashells’ type petals with compact low growing habit. Lilac Pink, Mix, Reddish Purple & White.
Picotee – 32″; White centers, magenta-red & carmine-rose edges
Red Illusion – 4 ft; huge 4″ semi-double to double bloms. Petals are marked at base and rim with spidery deep red veins over palest pink background. 60-90 days.
Rosetta – 30″; Large flowers, mostly single, some with collarettes. Background color is delicate pink shades, many with white, deep rose or white stripes the length of the petal.
Rubenza – 2 ft; shifts from bright ruby-red to rose. Large 3″ flowers w/ broad overlapping petals. Lacy deep-green foliage.
Rubinato – 2 ft; ruby red flowers with broad petals. Early to flower. Well branched and floriferous.
Seashells – 5 ft; fluted petals.
Sensation Series – 4 ft; Finely cut foliage & delicate, colorful flowers. Stands up to heat & humidity.
Sonata Series – 2 ft; dwarf. Pink, Pink Blush, White
Velouette – 24″ container, 32″ garden; red-purple shades, many with eye catching clean white streaks radiating from the center.
Cosmos – Missouri Botanical Garden
Specialty Cut Flowers by Armitage & Laushman
The Flower Farmer by Lynn Byczynski
Cut Flower Garden by Erin Benzakein
Recommended for Wildlife by
Some Favorite Nectar Plants – Washington Area Butterfly Club
Butterfly Gardening in the DC Area – Washington Butterfly Club