Flowers
Cosmos 'Double Dutch Rose'
Cosmos
These showy Cosmos produce large plants and masses of blooms over many weeks. Great for cutting with strong stems that hold flowers upright. Equally useful in filling gaps in existing borders for the summer season. Easy to grow and fast growing.
- Plant type
- Half-Hardy Annual
- Position
- Full Sun
- Height
- 1.2m
- Spread
- 30cm
Growing calendar
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Sow indoors
Sow outdoors
Flowering
Sowing & growing
Sow where they are to flower once risk of frost has passed. Sow March-May under glass in moist seed compost. Lightly cover with thin layer of soil. Propagate at 15-20°C. Transplant seedlings when they are large enough to handle and grow on. Acclimatise before planting out 30cm apart.
Aftercare
For bushier plants, pinch out growing tips when plants reach 15-20cm tall. Deadhead regularly for more blooms. Stems may require staking.
Gallery
Ref. SEC083