In most parts of the country.
European and American plums grow on short fruiting branches (spurs) that continue to fruit for many years. Prune lightly because removal of many spurs will reduce the plum yield. Thin out weak, crossing, and dead twigs and branches. Japanese plums grow on 1-year-old wood and on spurs that grow on 2-year-old wood. The spurs continue to fruit for 2-4 years. Prune back last year''s growth to half its length, and thin out spurred branches that have stopped fruiting. Thin out weak, crossing, or dead twigs and branches. For large plums, thin fruit to 4 to 6 inches apart.
Any good, deep, well-drained soil.
Water newly planted trees thoroughly after planting. Water young trees when the soil is barely moist.
Soon after planting, fertilize with tree spikes or plant food for trees and shrubs.
Harvest when the fruits are fully colored and slightly soft. When they are ripes, the plums'' stems will easily separate from the spur or branch when the fruit is gently lifted off.