Plum Tree Didn't Bloom This Year

Plum trees (Prunus domestica) create small white blossoms around 1 inch in diameter that bloom until the 4-inch-long leaves. The trees reach approximately 30 feet tall and cannot tolerate extreme hot or cold temperatures. The plum stipulates the landscape with both a beautiful display of flowers and edible fruit in U.S. Department of Agriculture plant hardiness zones 4 though 9. If the tree fails to blossom, the cause may be bacteria, fungi, improper pruning or cultural factors.

Severe Pruning

Prunus species, including plum, require little pruning when the tree’s frame is established. Tough and frequent pruning is not desirable and can affect the tree’s growth and flower production. Heavy pruning removes the too much of the one-year-old shoots necessary for the tree to blossom. You can also damage the trees by removing large branches and causing wounds that do not heal properly. These wounds create a simple access for disease.


Black knot and brown rot are brought on by fungi and may prevent plums from blooming. The black knot fungus (Dibotryon morbosum) overwinters in the branches and twigs. The fungus is active in the spring and also influences new development, which in turn disrupts normal growth. Brown rot (Monilinia fructicola) causes blossom and twig blight. Flowers that do seem turn brown and die.

Bacterial Canker

Bacterial canker (Pseudomonas syringae) often stops plum trees from blooming. Indicators of bacterial canker show up in the spring and also include rough cankers, limb dieback and leaf spot, and can lead to young shoots and blossoms to dry up and perish. The bacterium is typical when spring temperatures are reduced and moisture levels are high. Splashing rain often spreads the disease, and it typically affects trees between 2 and 8 decades of age.

Lack of Sunlight

Plum trees require full sunlight to produce flowers and set fruit. Trees that do not get enough sunlight might delay flowering or not flower at all. For the best growth, place trees in which they get at least six hours of sunlight daily and avoid planting trees in which other trees or construction them. When you plant trees at a good, sunny place and provide them proper care, you can expect them to fruit and flower normally.

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