Grapevine Grapes like a warm dry and well-ventilated environment like plenty of sunshine and are cold-tolerant. The berries are oval to oval-oblong purple-black or red with cyan when mature; the flowering period is June; the fruiting period is September-October. Grapes are regarded as rare fruits and are known as the first of the four major fruits in the world. The taste is particularly delicious crispy and juicy! Quality plants sturdy and durable!