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Cosmos Double All Sorts Mixed Seeds - Cosmos bipinnatus

Cosmos x bipinnatus Double All Sorts Mixed
Garden Cosmos, Mexican Aster

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1 reviews

Zero success (I must not be very skilled at sowing...)

M-Odile, 04/08/2022

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This plant carries a 6 months recovery warranty

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Cosmos Double All Sorts Mixed is a wonderful collection featuring blooms in a wide array of colours and forms. The single, semi-double and fully double flowers are solid or two-toned, sometimes with stripes and picotees. The abundant blooms appear all season long on tall plants, ideal for cutting! Easy to grow and effortlessly romantic, Cosmos thrive in light soil in a sunny position.  
Flower size
6 cm
Height at maturity
1.10 m
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 June to October
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Description

Cosmos Double All Sorts Mixed is a wonderful collection featuring blooms in a wide array of colours and forms. The single, semi-double and fully double flowers are solid or two-toned, sometimes with stripes and picotees. Colours include rose, bright pink, mauve, ruby red, deep burgundy and white. The abundant blooms appear all season long on tall plants, ideal for cutting! 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 capitula and very fine, feathery foliage. Double All Sorts Mixed quickly forms large clumps, about 110 cm (43.3 in) tall and 50 cm (19.7 in) wide. Flowering starts in June, 60-90 days after sowing, and lasts until October (or the first frosts). The flower heads measure between 5 and 7 cm (2 and 2.8 in) across and are made up of one or several layers of petals arranged around a golden central disc. The single, semi-double and fully double flowers display a host of harmonious shades including pale pink, deep red and white shades depending on the plant. Cosmos are a magnet for 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 for livening up romantic or cottage-style gardens. Easy to grow even by beginners, this adorable plant with its feathery green leaves and naive flowers brings 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.

Flowering

Flower colour multicoloured
Flowering time June to October
Inflorescence Flower head
Flower size 6 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Annual
Foliage colour green
Aromatic? Fragrant foliage when creased
Foliage description Delicately scented foliage

Plant habit

Height at maturity 1.10 m
Spread at maturity 50 cm
Growth rate fast

Botanical data

Genus

Cosmos

Species

x bipinnatus

Cultivar

Double All Sorts Mixed

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 3 mm (0.1 in), in a fine soil and cover the seeds with a very small pinch 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 7 cm (2.8 in). Grow them in cooler conditions until the plants are sufficiently developed to be planted outside. When all risk of frost has passed, gradually acclimatise the plants to outdoor conditions for 7 to 10 days.

Plant them outdoors in a very sunny location, in a moist, well-drained soil, spaced 45 cm (17.7 in) apart. Pinch the tips of the shoots on each stem, during transplantation, to encourage branching of the stems and the production of numerous flowers. Cosmos prefer a soil with a 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 can be targeted by aphids. Spontaneous seedlings are frequent but not always faithful, without becoming invasive.

Sowing period

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

Intended location

Suitable for Meadow
Type of use Border, Back of border, Vegetable garden
Ease of cultivation Beginner
Exposure Sun
Soil pH Any
Soil moisture Dry soil, Moist soil, light, well-draining
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