Helping You Become a More Successful Gardener
James H. Schutte
Golden Cosmos, Sulphur Cosmos
Golden cosmos is a tall, fast growing annual originating from Mexico that displays sunny, golden-yellow daisies in summer. Its upright, branching stems are lined with ferny, deeply divided foliage. They are topped throughout summer by many single, yellow to yellow-orange, bowl-shaped flowers which are visited by butterflies. The blooms are composed of showy ray petals surrounding a central button of yellow disc flowers, and are followed by sharp, star-like clusters of brown seeds.
This colorful, drought tolerant annual performs best in full sun and well-drained soil of low to modest fertility. Excessive water and fertilizer can result in leggy growth and fewer flowers. The plants may tend to be short-lived; however, prolonged bloom display can be achieved by sowing seeds in succession. Or, seeds may be gathered from the plants in midsummer, then scattered on the ground where they should germinate quickly, resulting in fresh blooms by late summer to fall.
Several popular strains and cultivars of golden cosmos have been developed which offer more compact growth, double flowers, and a wider range of colors including red and orange red. All are suitable as bedding annuals, in wildflower gardens, or for filling gaps in well-drained mixed borders.
12 - 1
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
1'-6' / 0.3m - 1.8m
1'-2' / 0.3m - 0.6m
Late Spring, Early Summer, Summer, Late Summer, Early Fall
Acidic, Neutral, Alkaline
Clay, Loam, Sand
Drought Tolerant, Average Water
Spring, Summer, Fall
Bedding Plant, Cutflower, Mixed Border, Wildflower
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