Cardiospermum is a half hardy perennial, though gardeners often treat it as a half hardy annual.It is a climber that may grow to 4 M in height.Cardiospermum flowers in the summer with white flowers and has green fruit.Other names for this garden plant include heart pea, Heart seed, Balloon vine (Cardiospermum halicacabum), Love in a puff, and Winter Cherry.