Cosmos bipinnatus 'Purity'
cosmea
This popular, pure white annual cosmos makes a great filler plant for a sunny, moist but well-drained border.
Dead-head Cosmos bipinnatus 'Purity' regularly and you'll have a succession of graceful, pure white, saucer-shaped flowers up to 10cm (4in) in diameter from June to October - and masses of feathery, mid-green leaves.
Dead-head Cosmos bipinnatus 'Purity' regularly and you'll have a succession of graceful, pure white, saucer-shaped flowers up to 10cm (4in) in diameter from June to October - and masses of feathery, mid-green leaves.
How to care for Cosmos bipinnatus Purity:
Pot on and grow on under glass until all risk of frost has passed and they can be planted outside in a well-prepared bed.
Pinch out the growing tips to encourage bushier growth, and feed at regular intervals throughout summer with a high-potash fertiliser. Taller plants may need supporting with brushwood stems in exposed positions.
Pinch out the growing tips to encourage bushier growth, and feed at regular intervals throughout summer with a high-potash fertiliser. Taller plants may need supporting with brushwood stems in exposed positions.
Sowing instructions:
In early spring, sow seed shallowly in seed trays and keep under glass, transplanting them into individual pots when large enough to handle. Harden off before planting outside after the frosts.
Alternatively, sow in-situ in mid- to late spring in a well-prepared bed and thin the seedlings out as they grow to allow approximately 30cm between each.
Alternatively, sow in-situ in mid- to late spring in a well-prepared bed and thin the seedlings out as they grow to allow approximately 30cm between each.
Flowering period:
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Eventual height:
1.2m
Eventual spread:
0.6m
Position:
Full sun
Rate of growth:
Fast-growing
Soil:
Moderately fertile, moist but well-drained soil, or peat-free general purpose compost
Hardiness:
Borderline hardy (will need protection in winter in colder areas)
approx 100 seeds
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