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20% off Hardy Shrubs
20% off Exotic, half-hardy plants and succulents

Cosmos Purity Seeds

Common Name:Cosmos

Plant Family: Asteraceae
Plant Type: Half-Hardy Annual

Lovely tall annual, growing to around 90cm, with fine feathery foliage topped by white daisies with frilly petals in summer. Drought tolerant and loved by Bees and Butterflies. Half hardy annual. In mild winters some seedlings may appear the following year.

Sow from March to September in trays or modules in the greenhouse or on the windowsill. When large enough to handle prick out into individual pots approx 9cm diameter. Gradually harden off before planting out at the end of May or after the risk of frost has passed

Cosmos Purity Seeds

POT SIZE/QUANTITY:  100 seeds approx
Season of Interest:  Summer to Autumn
Bee and Butterfly:  Both
Sun or Shade:  Sun
Height:  low (up to 3 feet)
Position/Situation:  Dry or gravel garden
Planting Style:  cottage
Suggested Use:  Kitchen Garden
Flower Colour:  White
Habit/Shape:  Bushy
Soil Type:  dry or sandy soil
Soil PH:  No preference
Sow:  March to May


9 in stock  

9 in stock

Price:  £1.10
List Price:  £2.20
Saving Of:  £1.10 (50%)

HALF PRICE on all Kings Seeds

Mainland UK  £8.50 -£10 Local delivery Postcodes IP1 through to IP8 & CO10 (minimum order value £35) FREE
Seeds & cuttings only  £2 Collect from our Nursery (Elmsett, Suffolk, IP7 6LZ) FREE
Scottish Highlands & offshore Islands From £10 We only send plants & seeds to UK locations (excl. Northern Ireland) Sorry we cannot ship to any other Country due to British Plant Health regulations on the export of plants post Brexit. There are no exceptions unfortunately  


See our delivery information page for details

Unless otherwise indicated our plants are supplied in the following pot sizes according to category. Dimensions refer to either the pot diameter (cm) or volume (litre);

  • Exotics/Conservatory & House Plants, Succulents: mostly as young plants in 9cm (approx. 0.5 litre)  or 1 litre pots
  • Hardy Perennials, Ferns and Grasses: 1 litre (approx. 12cm diameter)
  • Herbs: 9cm (approx. 0.5 litre)
  • Hardy Shrubs and Climbers: 1.5 or 2 litre 
  • Potted Bulbs: variable- please see "Quantity or Pot size" on plant information page 
  • Dormant Bulbs, Tubers and Bare-root perennials come either bagged or wrapped without a pot

The exact size of plants will vary with the growing season and may be cut back in accordance with normal pruning regimes or to fit in the box if they are excessively tall.