Plum trees (genus Prunus) are popular fruit trees, primarily of Japanese (P. salicina) or European (P. domestica) types, needing full sun, well-drained soil, and often cross-pollination, producing sweet stone fruits on spurs, with care involving pruning (spring best), fertilization, and pest management (like plum curculio) for harvests from late spring to fall, offering food for wildlife and delicious fruit for eating fresh or processing.