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Cosmos Sensation Purity Seeds - Cosmos bipinnatus
Beautiful development from seeds, into young plants and then into vigorous cosmos, endless flowering! They are quite tall so they tend to bend.
julie, 16/10/2024
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Dispatch by letter from €3.90.
Delivery charge from €5.90 Oversize package delivery charge from €6.90.
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This plant carries a 6 months recovery warranty
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
Seed-only orders are dispatched by sealed envelope. The delivery charge for seed-only orders is €3.90.
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Cosmos 'Purity' is a selection that displays snow white blooms over ferny, light green foliage. They appear all season long on semi-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 capitulums and very fine, feathery foliage. 'Sensation Purity' quickly forms semi-tall clumps, about 90 cm tall and 45 cm wide. Flowering starts in June-July and lasts until October (or the first frosts). The flower heads measure about 10 cm across and are made up of a layer of pure white petals arranged around a golden central disc. 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 Sensation Purity Seeds - Cosmos bipinnatus in pictures
Flowering
Foliage
Plant habit
Botanical data
Sow Cosmos seeds from March to May, at a depth of 3mm, in a fine compost and cover the seeds with a very light sprinkling of vermiculite. Place the seed tray in a mini-greenhouse at a temperature of 18-25°C 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. Grow them in cooler conditions until the plants are sufficiently developed to be planted outside. 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 apart. Pinch out 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 pH between 6 and 8.5, which corresponds 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-tolerant once established, they are not very susceptible to diseases but may be targeted by aphids. Spontaneous seedlings are common but not always true to type, without becoming invasive.
Sowing period
Intended location
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.