Capers/Cappero. Mature caper bushes can grow three feet high and spread four or five feet. They are quite pretty and aromatic. They require dry heat and intense sunlight to flourish. Will be killed by temperatures below 20 degrees F. In the north, bring them inside in the winter and treat them like rosemary. Seeds are sometimes difficult to germinate; soak seeds a day, put in refridgerator in wet towel in plastic bag for 6 weeks, then plant in 5" pots, 4 seeds/pot. Thin to strongest. When transplanting, disturb root as little as possible. May have flowers year 1, will have them year 2. 1 gram packet. To learn more about growing capers, click here.