Pistachio 'Sirora' FEMALE
Male and female trees are required to enable pollination. To grow and bear fruit Pistachio trees are best grown in regions with cool winters and hot, dry summers. They require more than 600 hours above 30 degrees Celcius and more than 1000 chill hours below 7 degrees Celsius. Summer and autumn rains may induce fungal problems and harvest difficulties. Water at least once a week, more often in dry weather, for the first couple of years. Prune to open up the centre of the tree and to remove branches overcrowding, rubbing or crossing.