01
Nov
2010
Cosmos sulphureus
Flowers | Magnoliopsida

Scientific Name - Cosmos sulphureus Cav.

Synonyms - sulfuric Bidens, Cosmos aurantiacus.

Popular names -

Distribution and Habitat - originally from Mexico.

Description - herbaceous annual, 60-150 cm; strain four corners, and branched pubescent. Leaves simple, opposite, pinnate or dublupenat language, 6-22 cm long. Flowers solitary, terminal, surrounded by two rows of bracts, 5-8 ligulate flowers, obovate, toothed, 1.8-3.5 cm long, bright orange or yellow-orange, tubular yellow flowers. Blooms in August-October. Fruit achenes with 2-4 bristles at the top.

Growth rate - fast.

Tolerances - drought and semiumbra.

Requirements - prefer rich soils, well-drained, sunny in the exhibition.

Management -

Propagation - by seeds, sown directly into the ground after last frost, primavara. Germinate after 7-21 days, 50-60 days after blooming to germinate.

The natural area is multiplied by self-sowing.

Diseases and pests -

Garden Partners - Asclepias curassavica, Coreopsis tinctoria, Oenothera fruticosa, Rudbeckia hirta, Salvia farinacea, Solidago canadensis, Tagetes erecta.

Cultivars - 'Cosmic Orange' Cosmic Yellow 'Sunny Red'.

Properties and Uses - used as an ornamental species for borders or groups.

Curious - has been declared invasive species in the U.S. in 1996.

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See also
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