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Cosmos Cosimo Red-White Seeds - Cosmos bipinnatus

Cosmos x bipinnatus Cosimo Red White
Garden Cosmos, Mexican Aster

4,8/5
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I sowed these Cosmos in full sun, they form magnificent, floriferous bushes and they have withstood the drought very well, the colour is magnificent.

Odile G., 26/08/2018

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This plant carries a 6 months recovery warranty

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Value-for-money
Cosmos 'Cosimo Red-White' is a gorgeous selection that displays bicoloured daisy-like blooms, raspberry red suffused with white. The abundant blooms appear early and continue all season long on semi-tall, well-branched plants. Easy to grow and effortlessly romantic, Cosmos thrive in light soil in a sunny position.
Flower size
7 cm
Height at maturity
60 cm
Exposure
Sun
Annual / Perennial
Annual
Germination time (days)
12 days
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Sowing period February to April
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Flowering time July to October
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Description

Cosmos 'Cosimo Red-White' is a gorgeous selection that displays bicoloured daisy-like blooms, raspberry red suffused with white. The abundant blooms appear early and continue all season long on semi-tall, well-branched plants. Easy to grow and effortlessly romantic, Cosmos thrive in light soil in a sunny position.

Cosmos bipinnatus is a tender annual plant native to Mexico and the southernmost part of the United States. It belongs to the Asteraceae family alongside Dahlias and daisies, featuring the characteristic inflorescences known as capitulums and very fine, feathery foliage. 'Cosimo Red-White' quickly forms well-branched, semi-tall clumps, about 60 cm tall and 30 cm wide. Flowering starts in July, about 60-90 days after sowing, and lasts until October (or the first frosts). The flower heads measure about 5-7 cm across and are made up of a layer of petals arranged around a golden central disc. Each petal features a white centre, suffused or edged with deep pink to raspberry red. Cosmos are a magnet to foraging insects and butterflies, including the monarch butterfly. The finely cut, cloud-like foliage resembles fennel leaves and is delicately scented. Flowers are followed by blackish, spiky seed heads (achenes).

Cosmos is an easy-going, rewarding annual that can single handedly fill a sunny slope, border or flower bed. It is perfect to animate romantic or cottage style gardens. Easy to grow even by beginners, this adorable plant with its feathery green leaves and naive flowers bring light and airiness to heavier blooms such as Dahlias. It combines well with perennial sage, Verbena bonariensis and chrysanthemums until the first frosts. It is particularly useful in new gardens mixed with poppies, love-in-a-mist or cornflowers. Its pretty blooms have a long vase life and are ideal for cutting.

Cosmos Cosimo Red-White Seeds - Cosmos bipinnatus in pictures

Cosmos Cosimo Red-White Seeds - Cosmos bipinnatus (Flowering) Flowering

Flowering

Flower colour pink
Flowering time July to October
Inflorescence Flower head
Flower size 7 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Annual
Foliage colour medium green
Aromatic? Fragrant foliage when creased

Plant habit

Height at maturity 60 cm
Spread at maturity 30 cm
Growth rate fast

Botanical data

Genus

Cosmos

Species

x bipinnatus

Cultivar

Cosimo Red White

Family

Asteraceae

Other common names

Garden Cosmos, Mexican Aster

Origin

Cultivar or hybrid

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Planting and care

Sow Cosmos seeds from March to May, at a depth of 3mm (0.1 in), in fine compost and cover the seeds with a very light sprinkle of vermiculite. Place the seed tray in a mini-greenhouse at a temperature of 18-25 °C (64.4 - 77 °F) or wrap it in a polyethylene bag. Keep the soil moist but not waterlogged. Light promotes germination, which occurs 7 to 15 days after sowing. When the seedlings are large enough to handle, transplant them into individual pots with a diameter of 7cm (2.8 in). Grow them in cooler conditions until the plants are sufficiently developed to be planted outdoors. When all risk of frost has passed, gradually acclimatize the plants to outdoor conditions for 7 to 10 days. Plant them in full sun, in a moist, well-drained soil, spaced 45cm (17.7 in) apart. Pinch the tips of the shoots on each stem, during transplantation, to encourage branching and the production of numerous flowers. Cosmos prefer a soil pH between 6 and 8.5, corresponding to the soil of their native habitat, the alkaline regions of Central America. They prefer full sun, but tolerate partial shade. These plants are drought-resistant once established, they are not prone to diseases, but may be targeted by aphids. Spontaneous seedlings are common, but not always true, without becoming invasive.

Sowing period

Sowing period February to April
Germination time (days) 12 days

Intended location

Suitable for Meadow
Type of use Edge of border, Container, Slope
Ease of cultivation Beginner
Exposure Sun
Soil pH Neutral, Calcareous
Soil moisture Dry soil, Moist soil, draining, not too rich
4,8/5
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