How do you overwinter Cobaea scandens?
Cobaea will behave as a perennial if kept indoors over winter at about 7°C (45°F). Outdoor plants may survive a very mild winter, in a very sheltered position with some protection, but Cobea grows quickly enough to be considered an annual if conditions don’t favour it surviving the winter. Cobaea grows best in full sun, and should be planted in moist but well-draining soil.Grow Cobaea scandens in moist but well-drained soil or in pots of peat-free, multi-purpose compost. Full sun is essential for cup and saucer vine to flower – plants may not bloom if growing in a too shady spot.
How long do cobaea scandens take to germinate?
The minimum temperature for germination is16°C or 60°F, the ideal temperature is around 21°C or 70°F. Germination usually takes 20 to 30 days. Once germinated the seedlings should be moved to larger 5 inch, 12cm pots with stakes inserted so that the young stems have something to twine around. Direct sow or transplant in late spring once the soil is warm. For transplants, start seeds indoors during the first two weeks of May. Optimal soil temperature: 25-35°C (77-95°F). Seeds should germinate in 7-14 days.