Purity

Quick Facts:

    • Hardy annual
    • Single snow-white flowers
    • Flowers up to 10cm (4") in diameter
    • Plants grow to 76cm (30") tall
    • Great cut flowers

Purity

Description:

Cosmos bipinnatus. Purity cosmos seeds yield single snow-white flowers to lighten the dark areas of a cottage garden. Regular dead heading will encourage continuous flowering from summer into late autumn. The ferny foliage on this variety is graced by the flowers up to 10cm (4") in diameter on plants that grow to about 76cm (30") tall. Stake this variety if growing in exposed areas, or use Green Garden Netting to keep plants upright. When they are just two feet tall, let their tips grow through a layer of netting lain flat over the bed. This will give them all the support they need.

Annual

Size: SKU: Price: Availability: Quantity: Total:
1g (approx. 150 seeds) FL2398A $3.49 In stock $0.00
5g (approx. 750 seeds) FL2398B $4.99 In stock $0.00
25g (approx. 3750 seeds) FL2398C $8.99 Unavailable  
125g (approx. 16250 seeds) FL2398D $22.99 Unavailable Notify me when in stock
500g (approx. 75000 seeds) FL2398E $59.99 Unavailable Notify me when in stock
$0.00

Quick Facts:

    • Hardy annual
    • Single snow-white flowers
    • Flowers up to 10cm (4") in diameter
    • Plants grow to 76cm (30") tall
    • Great cut flowers

How To Grow

Cosmos will flower more in poor soil, rather than rich, so avoid manures and fertilizers. Pinch out the growing point when plants are around 45cm (18″) tall to encourage bushier growth and more flowering points. Water during very dry spells, but otherwise, Cosmos is well suited to xeriscaping. Cosmos seeds are easy to harvest and save. These annual plants are sometimes referred to as Cosmea. Continue reading below for tips on how to grow Cosmos from seed.

Latin
Cosmos bipinnatus & C. sulfureus
Family: Asteraceae

Difficulty
Very easy

Season & Zone
Exposure: Full sun

Timing
Direct sow after the last frost date. Several sowings will result in a very long bloom period. Cosmos can also be started indoors in late winter for transplanting after last frost, once daytime temperatures are above 10°C (50°F). Seeds will sprout in 3-10 days. Optimal temperature for germination: 21-25°C (70-75°F).

Starting
Sow seeds very shallowly only a few millimetres (1/8″) deep. Thin or transplant to 20-25cm (8-10″) apart.

Growing
Most varieties can get quite tall, and in exposed or windy gardens can benefit from staking or trellis netting laid horizontally over the bed for the stems to grow through before blooming. Deadhead and cut for bouquets regularly to extend the bloom period.

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