Portulaca grows from seed or cutting. You can preserve at least one cutting each of every variety from the last season in a single pot and repot in spring for a gloriously colourful summer garden.
Usually, Sadabahar, Vinca Rosea, Lochinera Rosea, or Madagascar periwinkle, is the last plant to wilt in the summer sun. In Ayurvedic medicine, Sadabahar is a blood purifier and is found useful to combat blood-cancer.
Glardia is a hardy spring-summer seasonal.
Gazania is actually late spring.
Tecoma, oleander and kaner, are hardy summer blooming shrubs, and being poisonous they do not get eaten by cattle, even if planted on the roadside.