The propensity towards vigorous vegetative growth at the expense of flowers is encouraged by providing too much nitrogen. Many of the tender annual species are also worth consideration. See photo above left. A richly fragrant white-flowered vine for sun or partial shade. Click on the name for details.
Strong support is needed.
For best flowering, plant in full sun and go easy on high nitrogen fertilizers. Root pruning may stimulate flowering in established specimens. Plants grown from seed may take many years to flower, so growing one of the many named varieties is recommended. Flower color ranges from white to pink and shades of bluish-purple. Fragrance varies considerably between cultivars.