Fast growing annual vine thats name is from the flower- the bell like or cup like blossoms rest on the saicer-like calyxes. Great for your trellis. This vine is one of the fastest-growing and most trouble-free plant you will ever see in the garden. Pests do not disturb it; it grows effortlessly by twining to 20 feet; and it blooms abundantly from midsummer to fall. Direct-sow the seeds in full sun or part shade. This purple flowers also has an unusual color palette that is unexpectedly muted, especially when you consider the size and shape of the flowers. But this is a vigorous vine and hard to ignore in the landscape. It can take awhile to start blooming, the vine itself will quickly make itself at home and create a screen or cover. The opening buds have a somewhat unpleasant scent, but the fully opened flowers develop a floral-honey fragrance.
Tips on How to Grow Cup & Saucer Vine
|Sow indoors 6-8 weeks before your last frost. Start by soaking your seeds the night before as this will help speed up the germination process. Germination will be erratic, but be patient as you will see more sprouts with in 2-4 weeks.Or you can direct sow after ALL danger of frost, when you sow in seed keep in mind that the vines will get entangled, so start them off if seperate pots.|
|When planting, tuck the seeds into the soil vertically, with the longest edge facing down, and barely cover with soil. If you plant the seed flat down and covering them this will cause the seed to rot.|
They prefer warm soil at about 70-75F - you can use heat mats. They are very senstive to cold so protecy them from any cold drafts or temperatue dips.
Keep the vines watered regularly, but don't let the soil remain wet. Go easy on the fertilizer or you will get a lot of vine growth and few flowers. If necessary, side dress with compost in mid-summer.
Start training your vines early and they'll take it from there. If you would like to control its size, you can pinch the stems when they reach the top of your support or eye level. This will encourage branching and bud setting.
Cobaea can attract aphids, especially when the plants are young and succulent. Frequent blasts of water or a couple of treatments of insecticidal soap should control them.