Apricot , Armenian plum. Prunus armeniaca, the most commonly cultivated apricot species, also called Ansu Apricot, Siberian apricot, Tibetan apricot. One of the earliest ripening fruits. Needs well-drained, moderately fertile soil. Is very winter hardy, resists root knot nematodes, and produces a 12'-18' tree. By pruning you can keep your tree at any height. Ripen late May to early June Chill requirement is 200-300 hours below 45F. See Article about low chill apricots.