Punica granatum is grown as a fruit horticulture crop plant, and as ornamental trees and shrubs in parks and gardens. Mature specimens can develop sculptural twisted bark multi-trunks and a distinctive overall form. Pomegranates are drought-tolerant, and can be grown in dry areas with either a Mediterranean winter rainfall climate or in summer rainfall climates. In wetter areas, they can be prone to root decay from fungal diseases. They are tolerant of moderate frost, down to about âˆ’10 °C (14 °F). Insect pests of the pomegranate can include the pomegranate butterfly Virachola isocrates and the leaf-footed bug Leptoglossus zonatus. Pomegranate grows easily from seed, but is commonly propagated from 25â€“50 cm hardwood cuttings to avoid the genetic variation of seedlings. Air layering is also an option for propagation, but grafting fails.