Planting annual flowers can be a frustrating endeavor: You spend a lot of money (either on seeds or starts) and invest all that time in planting, just to watch them die at the end of the season.

Growing time-lapse of an evening primrose plant (Oenothera biennis) from a seed to blooms. We used a 12-inch pot to plant covered with soil for this demonstration. A seedling appeared 1 week after ...

This Indian species (Asystasia gangetica) is a creeping, clambering perennial at home in sun or moderate shade. The petunia-like blossoms can be white or yellow and appear throughout the warm season.