Cosmos bipinnatus 'Sea Shells'

Cosmos bipinnatus 'Sea Shells' Photo/Illustration: Susan Roth



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Botanical Name: Cosmos bipinnatus 'Sea Shells' KOZ-mose by-pin-AY-tus Genus: Cosmos
This unique annual produces quilled blossoms of hollow, tube-shaped petals that radiate from the center in shades of white, pink, or carmine red. The flowers, which bloom all summer long, sometimes have bicolored interior and exterior tubes. 
Noteworthy characteristics: This Mexican native is loved by butterflies. It produces excellent cut flowers and is ideal for a cutting garden, mixed border, or annual border. 
Care: Deadhead to prolong flowering, and also leave some seeds to self-sow. The plants are moderately drought and heat tolerant.
Propagation: Sow seed in situ in late spring or at 61°F in mid-spring.
Problems: Stem canker, powdery mildew, Rhizoctonia stem rot, gray mold, aphids.
Height 3 ft. to 6 ft.
Spread 6 in. to 12 in.
Growth Habit Clumps
Growth Pace Fast Grower
Light Full Sun Only
Moisture Dry to Medium
Maintenance Moderate
Tolerance Drought Tolerant
Characteristics Attracts Butterflies; Self Seeds; Showy Flowers
Bloom Time Early Fall; Early Summer; Fall; Late Summer; Summer
Flower Color Pink Flower; Red Flower; White Flower
Uses Beds and Borders, Cut Flower
Style Cottage Garden
Seasonal Interest Summer Interest, Fall Interest
Type Annuals

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