All plum trees are ornamental in the fact that they bloom in early spring with a profusion of pink or white flowers. Some have deep green summer foliage, while others have dark purple leaves that turn bronze in the fall. Dwarf flowering plums average a maximum height of only around 15 feet. These trees are standard plums that are grafted onto dwarf rootstock, which is usually from peach trees, according to Clemson University.
Purple Pony Dwarf
This purple-leaf variety of Prunus cerasifera grows to a maximum height of about 15 feet. According to Clifton's Flower & Garden Center, it is fruitless, or sterile, so it is grown for ornamental purposes only. This tree blooms with light-pink flowers in early spring and is cold hardy to U.S. Department of Agriculture zone 4.
Dwarf Santa Rosa Plum
This variety is the most popular dwarf plum tree, according to Fast Growing Trees Nursery. Although it is grafted onto rootstock, it can grow to 20 feet in the wild. In cultivation, it usually remains much smaller. This tree only needs a small amount of space to grow, but produces a high quantity of fruit. It is hardy in USDA zones 5 through 10.
The Stanley plum tree comes in both standard and semi-dwarf varieties. The dwarf variety reaches a maximum size at maturity of between 15 and 18 feet. This tree produces plums with a very sweet flavour and grows best in USDA plant hardiness zones 4 through 10.
This variety is one of the hardiest of the plums, according to the University of Connecticut. It grows to an average height of 15 feet and features dark-purple summer foliage, purple fruit and pink flowers. The Newport plum is winter hardy to USDA zone 4 and is a good choice for home gardeners who live in New England states and want a thoroughly purple ornamental tree.
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