Sweet Pea Blue Danube can be sown from January to October
September sowings in flowering site 2cm deep. Later sowings in pots 5 seeds in each. October and November sweet pea sowings in a greenhouse.
January sowings in a heated glasshouse.
March sowings in a cold frame.
April sowings direct to flowering site.
Greenhouse raised seedlings should be hardened off during March. Plant out pot grown blue danube sweet pea seedlings in the flowering site 15cm apart in April. Thin direct sown seedlings to 10cm apart.
Pick sweet pea flowers regularly to encourage new growth.
Blue Danube Sweet Pea will flower from May to September, if you pick the flowers regularly.