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Cosmos Sonata Rose - Garden Cosmos

Cosmos x bipinnatus Sonata Pink Blush
Garden Cosmos, Mexican Aster

3,5/5
2 reviews
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1 reviews

A bit too early to tell, but the packaging was fine.

MARTINE B., 25/05/2017

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From 12,50 € 2L/3L pot

Available in 4 sizes

3
From 5,90 € 8/9 cm pot

This plant carries a 6 months recovery warranty

More information

The Cosmos Sonata Rose with a dark centre is an annual plant that blooms for nearly 6 months.
Flower size
6 cm
Height at maturity
50 cm
Spread at maturity
30 cm
Exposure
Sun
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Best planting time February to April
Recommended planting time April to June
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Flowering time June to October
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Description

The Light Pink Cosmos Sonata with a Dark Centre is an annual plant that flowers for almost 6 months.

 

Throughout the summer, it has a continuous flowering of large, single and airy flowers, measuring 5 to 8 cm (2 to 3in) in diameter with a wide cup shape. This Cosmos, the earliest and shortest (50cm (20in) in height at ripeness), allows for cultivation in flower beds and large containers. It has a soft pink flower, maculate with purple at the centre. Its leaves, measuring 20 to 30 cm (8 to 12in), are very airy and deeply cut, and are of a medium green colour.

The Cosmos Sonata thrives in sunlight and is resistant to light frosts. It is used in gardens for flower beds, borders, and even containers. It is also suitable for cut flowers.

Note: Please be aware that our plug plants are professional products intended for experienced gardeners. Upon receipt, transplant and store them in a sheltered location (veranda, greenhouse, cold frame) at a temperature above 14°C (57.2°F) for a few weeks before placing them outdoors once the risk of frost has passed definitively.

 

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Cosmos: sowing and planting
Family sheet
by Virginie T. 14 min.
Cosmos: sowing and planting
Read article

Flowering

Flower colour pink
Flowering time June to October
Flower size 6 cm

Foliage

Foliage persistence Annual
Foliage colour medium green

Plant habit

Height at maturity 50 cm
Spread at maturity 30 cm
Growth rate fast

Botanical data

Genus

Cosmos

Species

x bipinnatus

Cultivar

Sonata Pink Blush

Family

Asteraceae

Other common names

Garden Cosmos, Mexican Aster

Origin

Cultivar or hybrid

Product reference4913391

Other Cosmos

3
From 5,90 € 8/9 cm pot

Planting and care

The Cosmos Sonata Light Pink with White Centre loves the sun and is easy to grow. Place it in a moderately fertile, neutral soil that is moist but well-drained. Plant it during the spring (May to June) for flowering from June to October. To prolong the flowering, remove the faded flowers. Water it well and mulch. Cosmos bipinnatus can be susceptible to botrytis disease (gray mold) and slugs and aphids.

Planting period

Best planting time February to April
Recommended planting time April to June

Intended location

Type of use Border, Free-standing, Container
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Planting density 6 per m2
Exposure Sun
Soil pH Neutral
Soil moisture Moist soil, well-drained

Care

Overwinter Can be left in the ground

Planting & care advice

  1. How to sow cosmos

Cosmos are easy-to-grow, long-flowering annuals (Cosmos bipinnatus, Cosmos sulphureus) ideal for borders, beds and pollinator-friendly gardens. Follow these steps for reliable results.

When to sow
- Sow under cover: 4–6 weeks before last expected frost.
- Sow outdoors: after all risk of frost has passed and soil has warmed.
- In mild climates: sow in autumn for early spring display.
- For continuous flowering: sow every 2–3 weeks until early summer.

Seed preparation and soil
- No special pre-treatment required; seeds can be sown dry.
- Choose well-drained, moderately fertile soil. Cosmos prefer lean to average soil; very rich soil encourages floppy growth.
- Position: full sun for best flowering.

How to sow
- Surface-sow or cover very lightly: press seeds into soil or cover with about 2–5 mm of compost or soil.
- Spacing: thin/plant out to 20–30 cm (8–12 in) for tall C. bipinnatus; 10–15 cm (4–6 in) for compact C. sulphureus.
- Germination: 7–21 days at around 18–24 °C; keep soil just moist until seedlings establish.

Practical care
- Watering: keep moist while seedlings establish, then water sparingly—cosmos tolerate drought and too much water reduces flowering.
- Feeding: little or no fertiliser; a light low-nitrogen feed encourages blooms without excessive foliage.
- Pinching: optional. Pinch growing tips when plants reach about 10–15 cm to encourage bushiness and more flowers, but note pinching delays first blooms slightly.
- Support: stake taller varieties in exposed sites to prevent flopping.

Maintenance and problems
- Deadhead spent flowers regularly to prolong bloom period.
- Pests/diseases: generally trouble-free. Watch for slugs on young seedlings and powdery mildew in humid, overcrowded conditions.
- To save seed: let heads dry on plant until brown, then collect seeds and store in a cool dry place.

Quick tips
- Sow directly where plants will flower to avoid root disturbance.
- Use succession sowing for long season of colour.
- Mix varieties for different heights and colours to create natural, airy displays.

With minimal attention, cosmos will reward garden with abundant, long-lasting flowers attractive to bees and butterflies. Tips

    How to sow cosmos Cosmos are easy-to-grow, long-flowering annuals (Cosmos bipinnatus, Cosmos sulphureus) ideal for borders, beds and pollinator-friendly gardens. Follow these steps for reliable results. When to sow - Sow under cover: 4–6 weeks before last expected frost. - Sow outdoors: after all risk of frost has passed and soil has warmed. - In mild climates: sow in autumn for early spring display. - For continuous flowering: sow every 2–3 weeks until early summer. Seed preparation and soil - No special pre-treatment required; seeds can be sown dry. - Choose well-drained, moderately fertile soil. Cosmos prefer lean to average soil; very rich soil encourages floppy growth. - Position: full sun for best flowering. How to sow - Surface-sow or cover very lightly: press seeds into soil or cover with about 2–5 mm of compost or soil. - Spacing: thin/plant out to 20–30 cm (8–12 in) for tall C. bipinnatus; 10–15 cm (4–6 in) for compact C. sulphureus. - Germination: 7–21 days at around 18–24 °C; keep soil just moist until seedlings establish. Practical care - Watering: keep moist while seedlings establish, then water sparingly—cosmos tolerate drought and too much water reduces flowering. - Feeding: little or no fertiliser; a light low-nitrogen feed encourages blooms without excessive foliage. - Pinching: optional. Pinch growing tips when plants reach about 10–15 cm to encourage bushiness and more flowers, but note pinching delays first blooms slightly. - Support: stake taller varieties in exposed sites to prevent flopping. Maintenance and problems - Deadhead spent flowers regularly to prolong bloom period. - Pests/diseases: generally trouble-free. Watch for slugs on young seedlings and powdery mildew in humid, overcrowded conditions. - To save seed: let heads dry on plant until brown, then collect seeds and store in a cool dry place. Quick tips - Sow directly where plants will flower to avoid root disturbance. - Use succession sowing for long season of colour. - Mix varieties for different heights and colours to create natural, airy displays. With minimal attention, cosmos will reward garden with abundant, long-lasting flowers attractive to bees and butterflies.

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3,5/5

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