These seeds were collected from Cryptostegia grandiflora, also known as India Rubber Vine. These vines like to live in full sun to partial shade where they grow to about 6 feet tall as a shrub or 50 feet long as a vine if it has the support. The lavender and white blossoms are out almost all year long with the exception of the dead of winter. A latex can be extracted from the stems and used to make rubber. USDA Hardiness Zones 10 to 12.