The American Plum's 2 to 5 inch white flower pods appear in early spring before the foliage appears. Leaves Dropping After Transplant and Other Signs of Shock. Improper watering practices – Watering properly is important to prevent leaf drop. Plums hybridize with each other rather easily, allowing horticulturists to cross species to develop plum trees with more cold hardiness, better sized or tasting fruits or more resilient to diseases. Weeping trees often carry the cultivar name “Pendula” because of their droopy branches. 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Phototoxicity often happens when summer oil sprays, like neem oil or insecticidal soaps, are applied when the tree is under stress from dry conditions or when temps are over 80 F. (27 C.). Bacterial canker is another serious disease that affects plums and other trees of the same plant family (Prunus). Most problems of leaf drop on your plum trees are cultural and environmental in nature, so examine these first. Is it possible that it will spread to the rest of the tree? Care of plum trees is not difficult as long as you are consistent. Susanna Lienhard. Repeat when flower shucks split, then weekly for 2 wk. Plum trees drop fruit naturally in two major cycles. A strong spray of water can reduce the aphid population and a dormant oil spray at bud swell can be applied. It's usually only when people don't prune at all that the branches get too long and saggy. Peach and Nectarine remove 50% of last years growth. A wide selection of Victoria Plum trees offered for sale at Raintree Nursery. Trees use their limbs and branches to support leaves for gathering sunlight and releasing waste products. The American plum tr… These branches provide structure and keep the tree's shape balanced. The answer to that question is simple, prune your plum tree when it's growing strongly and for established plum trees early June to mid July is the best time. Typically, the first obvious symptom involves the sudden wilting of foliage on one side of the tree. If this is a question and you need a solution, be advised that there are many reasons why your plum tree is losing leaves. Some of these may include: Making the appropriate choice of tree to plant and purchasing healthy disease resistant varieties is the key to preventing and managing any future problems. I was very concerned that with the deep freeze in Nov. that the tree would not do well this spring. You would just want to have other branches that would "fill in" the area where you prune - those would be branches that are there now. Pruning Abandoned or Neglected Fruit Trees Sign up for our newsletter. Irregular crown with long branches and short needles. IPM consists of identifying the pest, whether insect or disease, and learning about its life cycle, foresee and avert problems by reducing tree stressors, and choosing the least toxic control method, which can be anything from hand picking bugs to horticultural oil and insecticidal soap applications. Consult a nursery or extension office for information on the correct chemical fertilizer and timing for application, or an organic fertilizer (such as composted manure and yard waste) can be used. A knowledgeable landscape designer can help to determine the perfect spot to plant this flowering tree on your Southern California property. All you need to do is know the symptoms, recovery techniques and time it takes to repair trees. However, not all trees are created equal. First you need to try to identify the cause and then prepare a plan of attack to resolve the problem. Cleaning up debris, weeds, and grass from around the base of the tree Give tree roots at least one inch of water per week. Ask an Expert is made up of groups and individual experts. Plum trees don’t fruit until they … Purple-leaf plum trees, also flowering plum trees or cherry plum trees, can add interest to your yard or garden with their dark red to purple foliage and abundance of white to light pink spring blossoms. Do not prune it in winter /spring because the risk of fungal infection is high and don't prune it in autumn because the leaves are needed by the tree to transfer nutrients to it as they die. Golden Curls Willow (Salix matsudana) This tree was once considered to be a weeping willow, but … Phonetic Spelling PROO-nus ah-mer-ih-KAY-nah This plant has low severity poison characteristics. Also, the honeydew excreted by aphids leads to sooty mold. Your plum tree is definitely declining rapidly as shown by your photos. But transplant shock can look much different for your tree. Perennial canker is a similar fungal infection caused by the Valsa cincta and V. leucostoma fungi, and causes oval cankers to appear on the branches and trunk. As a shrub, it suckers freely and can form large colonies. The leaves of afflicted trees will usually look yellow, and many will fall off the tree prematurely. Don’t over prune young trees, unless it’s to remove dead or damaged branches. Generally three types of plum trees are grown for their tasty fruits: European plum (Prunus domestica), Japanese plum (Prunus salicina) and numerous native American plum species. I realize these two "solutions" probably aren't solutions! Pigeons can be a real problem with plum trees (and cherry trees as well), they first go for the leaves and rip them apart. Apply a two-to-four-inch deep layer of mulch from the base of the tree to the drip line. 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