Cosmos (sulphureus)(bipinnatus)

(koz' moce)

Common name: Cosmos

Family: Asteraceae, Aster

Height x width: 1-3' x 1-2'

Growth rate: fast

Foliage:opposite, entire or lobed, pinnately cut

Flowers: solitary or in loose panicles; yellows, reds, oranges, pinks, white ray flowers; disk flowers yellow

Hardiness: annual

Soil: well-drained, tolerates dry

Light: sun

Pests and problems: bacterial wilt, canker, aphids, Japanese beetles, mites

Landscape habit, uses: borders, cutting; fine texture

Other interest: mostly native to Mexico; genus name from Greek for beautiful

Other culture: self seeds; high fertility promotes foliage rather than flowers; space 12" apart

Propagation: seed (5000 seeds per ounce) sown direct, or indoors 5-6 weeks before planting out


bipinnatus (bii-pin-aa' tuss)--5-6' tall, pinch early for bushy habit; red, white, pink, lavender

sulphureus (sul-fure' ee-us)--Yellow Cosmos, 1-3' tall, some compact cultivars

Cultivars species flowers other
'Bright Lights' sulphureus yellows, oranges, reds mix, 24" tall
'Candystripe' bipinnatus white, red striped earlier by 2 weeks
'Dazzler' bipinnatus crimson 4' tall
'Diablo' sulphureus burnt-orange 18-22" tall, semi-double 
Early Sensation Hybrids bipinnatus reds, pink, white 2 weeks before Sensation
'Early Wonder' bipinnatus white, rose reds mix earliest, 4-5" flowers
'Imperial Pink' bipinnatus rose-pink, 4" across 3-4' tall
Ladybird Hybrids sulphureus reds, orange, yellows 12" tall, semi-doubles
'Pinkie' bipinnatus pink 3-4' tall
'Purity' bipinnatus white 3-4' tall
'Radiance' bipinnatus rose and crimson bicolor 3-4' tall, 4-6" flowers
'Sea Shells' bipinnatus white, pink, crimson fluted flower petals
Sensation Hybrids bipinnatus reds, pink, white 3-4' tall
Sonata Hybrids bipinnatus rose, white 2-3' tall, single, daisy-like
Sunny Hybrids sulphureus golds, red 12-14" tall, semi-doubles
'Sunset' sulphureus orange-scarlet 24-30" tall
'Versailles' bipinnatus white, pinks, reds Japanese cutting variety

©Authored by Dr. Leonard Perry, Professor, University of Vermont as part of PSS123 course.

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