When to sow
September to April
Where to sow
September sowings in flowering site 2cm (3/4") deep. Later sowings in pots 5 seeds in each. October and November sowings in a cold frame. January sowings in a heated glasshouse. March sowings in a cold frame and April sowings direct to flowering site.
What to do next
Glasshouse raised seedlings should be hardened off during March. Plant out pot grown seedlings in the flowering site 15cm (6") apart in April. Thin direct sown seedlings to 10cm (4") apart. Pick flowers regularly to encourage new growth.
Late June to September
Provide sturdy support for plants as after a good rain a mature plant will be heavy.