Alphabetical Plant Listing

Cosmos bipinnatus 'Rosetta'

Mexican Aster 'Rosetta'


Early and floriferous, Cosmos bipinnatus 'Rosetta' is a half-hardy annual boasting large semi-double flowers, up to 4 in. across (10 cm), with striped petals in shades of soft pink, blush, rose and white. A ring or collarette of smaller fluffy petals surrounds the bright yellow center. Blooming for months from early summer to fall, the ravishing blossoms are borne atop tall stems and float above the fine, feathery foliage. Fairly pest-free and low maintenance, add this charming plant to the landscape and you will be rewarded with abundant butterflies. Creating a graceful visual impact in the garden, it is perfect for sunny borders or containers. Excellent as cut flowers.

  • Grows up to 36 in. tall (90 cm) and 20 in. wide (50 cm).
  • Performs best in full sun, in average, moist, well-drained soils.
  • Ideal addition to beds and borders, containers, cottage gardens, prairies and meadows and cutting gardens.
  • keep an eye out for aphids, slugs, gray moulds.
  • Propagate by seeds.
  • Pinching off dead blossoms will promote continuous blooming. If the flower heads remain, the cosmos will self-seed, but will not become a nuisance.

Not sure which Cosmos to pick?
Compare All Cosmos

Buy Cosmos bipinnatus 'Rosetta'

Requirements

Hardiness 2 – 11
Heat Zones 1 – 12
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals
Plant Family Cosmos
Exposure Full Sun
Season of Interest Summer (Early,Mid,Late)
Fall
Height 2' – 3' (60cm – 90cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 16" (40cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Showy
Attracts Butterflies, Hummingbirds
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Cutting Garden, Informal and Cottage, Prairie and Meadow, Traditional Garden

Buy Plants

Great Plant Combination Ideas with Cosmos

Guides with Cosmos


* Picture courtesy of Fleuroselect

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 2 – 11
Heat Zones 1 – 12
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals
Plant Family Cosmos
Exposure Full Sun
Season of Interest Summer (Early,Mid,Late)
Fall
Height 2' – 3' (60cm – 90cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 16" (40cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Showy
Attracts Butterflies, Hummingbirds
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Cutting Garden, Informal and Cottage, Prairie and Meadow, Traditional Garden

Great Plant Combination Ideas with Cosmos

Guides with Cosmos

Plant Calculator

How many Cosmos bipinnatus 'Rosetta' do I need for my garden?

%
ft
ft

Your Shopping List

Plant Quantity
Cosmos bipinnatus 'Rosetta'

Find your Hardiness Zone

Find your Climate Zone

Find your Heat Zone

Join Gardenia.net

Create a membership account to save your garden designs and to view them on any device.

Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

Join now and start creating your dream garden!

Create a New Collection

Optional. For your reference.


Move Selected Plants to a Different Collection


Delete Collection

This field is required.