Are Pistachios Tree Nuts. They're often served as hors d'oeuvres at dinner parties, but make for a great snack food too. In fact, they're the edible seed of the pistachio tree fruit.
They are drupe, where the fruit has a large seed. The pistachio tree bears pistachios; Not only are pistachio nuts delicious and fun to eat, they are also very healthy. Pistachios are nuts grown around the world on trees up to 20 feet tall.
Their greatest need is for supplemental water (up to 50 gallons a day.
For pistachios, the result of such conditions can be hollow nuts. The leaves of the pistachio are pinnate and composed of five individual oval leaflets. The nuts grow on gorgeous compact trees, only 3m tall and wide, making them ideal for the average home garden. (a pistachio tree's nut is actually the seed of its fruit.) without growing both a female and male tree, you won't have any nuts to harvest.