Soursop (Annona muricata) is a tropical evergreen tree from the custard apple family, known for its large, spiny, green fruit with white, fibrous flesh that tastes like a mix of mango, pineapple, and citrus. Native to the American tropics, it's cultivated worldwide in warm climates (USDA zones 10-11) and is used for drinks, desserts, and traditional remedies, though its leaves and seeds are sometimes used in teas. The plant requires full sun, well-drained soil, and protection from frost, with grafted trees bearing fruit in 2-3 years.