Cosmos - Seashells
This variety features fluted sea shells around a button like centre. The finely cut, ferny foliage is also useful for cutting.
Sow 3mm deep in spring at 21-24C in a good seed compost. Keep soil damp but not wet, sealing in a polythene bag after sowing is helpful. Germination usually takes 5-10 days. When seedlings are large enough to handle, transplant and grow on in cooler conditions. Gradually acclimatise to outdoor conditions for 1-15 days before planting out after all risk of frost, 6cm apart. Plant in a sunny spot on light well drained soil. For pot plants, transplant the seedlings into 7.5cm pots, grow cool, well ventilated and give plenty of light, but shade from direct sun.