Growing
Cosmos will grow on a wide range of soils, but respond best
to well drained friable soils or sandy loam. They need full
sun and because of their height should be sheltered from strong
winds. However, if planted closely together, they will support
each other.
Cosmos ideal for dry conditions, but will produce larger blooms
if watered regularly.
Propagation from seed in spring and through to summer. Seedlings
are best raised in garden beds, boxes or punnets before planting
out. Transplant to about 45 cm apart. In hot weather mulching
with grass clippings will keep the roots cool and moist.
Colours include plain white, rose, crimson, red, orange and
yellow.
Varieties:
Mammoth Single Mixed grows to 120 cm and has large rose
and crimson flowers with a sprinkling of white.
Brightlights grows to 75cm, is an early variety with
attractive foliage and masses of double flowers in red, orange
and yellow shades.
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