How to Prune a Plum Tree: When, How Much and Step-by-Step Cuts

By the Garden Voila editorial team · Updated October 27, 2026 · How we verify

To prune a plum tree, prune once a year in late winter or early spring, just before buds open, when the tree is dormant and the weather is dry. Remove dead, diseased and crossing branches first, then thin crowded growth so light reaches the center, removing roughly a quarter of the branches on an established tree. Train European plums to a modified central leader with four or five scaffold branches, and Japanese plums to an open center (vase) with three or four. Avoid late-summer and fall pruning in cold climates, and cut out black knot every winter.

How to prune a plum tree: quick guide

These systems follow the Utah State University Extension plum guide. If you are not sure which group your tree belongs to, see types of plum trees.

When is the best time to prune a plum tree?

For most of the US, the best time is late winter to early spring, while the tree is dormant but the worst cold has passed and before buds swell. USU recommends pruning plums annually in late winter or early spring and warns that late-summer and fall pruning can push late growth that is damaged by an early winter. Pruning in dry weather matters too: plums are susceptible to bacterial canker and, in some regions, silver leaf, both of which can enter fresh cuts in cool, wet weather.

• Dormant pruning (late winter): Structural pruning, thinning, height reduction and black knot removal.
• Summer pruning (just after harvest): Light height control on vigorous Japanese plums, removal of water sprouts and suckers. Many West Coast growers prefer summer pruning for apricots and plums because dry summer weather reduces disease risk.
• Avoid: Pruning in wet weather, during bloom, and from late summer to fall in cold-winter areas.

In the UK and other mild, damp climates, the Royal Horticultural Society advises pruning plums in spring or summer rather than winter to reduce silver leaf infection, so follow local guidance if you garden there.

What tools do you need to prune a plum tree?

• Sharp bypass hand pruners for shoots up to about ¾ inch.
• Bypass loppers for branches about ¾ to 1½ inches; see our guide to loppers.
• A pruning saw for larger limbs.
• Rubbing alcohol or a household disinfectant to clean blades between trees, and between cuts when removing black knot or canker.
• Gloves and eye protection.

How do you prune a newly planted plum tree?

Training starts at planting. The University of Georgia Extension plum guide recommends cutting a newly planted tree back to about 18 to 24 inches to force low buds to grow. Then:

1. First summer: Choose three or four strong, well-spaced shoots growing in different directions as future scaffold branches. Remove or pinch back the rest.
2. First winter: For Japanese plums, remove the central leader above the scaffolds to open the center. For European plums, keep a central leader and choose four or five scaffolds spaced about 8 to 10 inches apart vertically, the lowest at least 24 inches off the ground.
3. Second and third years: Remove shoots growing into the center or below the scaffolds, and lightly shorten scaffolds to outward-facing buds to encourage branching. Keep pruning light so the tree begins to fruit.

UGA suggests doing much of this early training in summer during the second and third years, which slows vigor and encourages fruiting spurs.

How do you prune an established plum tree?

1. Remove the three Ds. Cut out dead, diseased and damaged wood first, including any black knot swellings, cutting 3 to 4 inches below each knot into healthy wood.
2. Remove suckers and water sprouts. Take off shoots from the rootstock at ground level and vigorous vertical shoots from the trunk and main limbs.
3. Remove crossing and inward-growing branches. Keep the branch that is better placed and remove the other.
4. Thin the canopy. USU suggests removing about 25 percent of branches on established trees to let light into the canopy and improve fruit quality.
5. Renew fruiting wood. Plums bear mainly on spurs on wood 2 to 5 years old. Remove a few of the oldest, least productive branches each year so younger wood replaces them.
6. Control height. Cut tall upright limbs back to an outward-facing side branch at least a third their diameter. Do not leave stubs.

How is pruning European plums different from Japanese plums?

The two groups grow and bear differently, so they need different treatment. The University of Illinois Extension explains that young European plums need little pruning because they have a spur-type habit with little branching, and that mature European plums should be pruned moderately because they struggle to recover from heavy pruning. Japanese plums need more severe pruning, and their centers should be kept open.

How do you prune a neglected or overgrown plum tree?

Spread the work over two or three years. In the first winter, remove dead, diseased and broken wood, suckers and the worst crossing limbs, taking out no more than about a quarter to a third of the living canopy. In the second year, lower the height by cutting tall leaders back to outward side branches and thin crowded areas. In the third, finish thinning and settle into normal annual pruning. Removing too much at once triggers a thicket of water sprouts and can cost several crops. The same approach works for apples; see our guide to fixing a badly pruned apple tree.

How do you make pruning cuts on a plum tree?

• Thinning cut: Removes a whole branch back to its point of origin, just outside the branch collar. Opens the canopy without stimulating much regrowth. Use this for most cuts.
• Heading cut: Shortens a branch back to a bud or side branch. Stimulates new shoots below the cut. Use sparingly, mainly when training young trees.
• Three-cut method: For heavy limbs, make an undercut about 12 inches from the trunk, then cut through from above a little farther out to drop the limb, then remove the stub just outside the collar.
• No wound paint: Clean cuts close on their own; dressings do not prevent decay.

Should you thin plums as well as prune?

Yes. Pruning removes some flower buds, but most plums still set far more fruit than they can size well. USU recommends thinning European and Japanese plums to about 4 to 6 inches apart once frost danger has passed, and UGA suggests thinning 30 to 45 days after bloom to one fruit every 2 to 4 inches. American hybrids generally need thinning only if you want larger fruit. Thinning reduces limb breakage, brown rot and alternate bearing.

How do you prune for black knot and canker?

Black knot is the most serious plum disease in much of the East and Midwest. Inspect trees every winter and cut out each hard, black swelling at least 3 to 4 inches below the visible knot. For cankers that ooze amber gum, cut back to healthy wood, about a foot below visible symptoms, in dry weather. Disinfect pruners between cuts, and burn, bury or bag infected prunings rather than leaving them under the tree. Use the plant problem identifier if you are unsure what you are seeing.

Common plum pruning mistakes

How do you keep a plum tree small?

Start with a semi-dwarf or dwarfing rootstock, then prune every year to a fixed height, such as the tallest point you can reach from the ground. Summer pruning right after harvest is the most effective way to limit size on vigorous Japanese plums, because removing leafy growth in summer reduces the tree’s energy for regrowth. Narrow, upright varieties such as the Burgundy plum are easier to keep small, and multi-graft trees or several small trees in one hole are other space-saving options; see the cocktail fruit tree guide.

Do plum trees need pruning every year?

Yes, ideally. Annual light to moderate pruning keeps the tree open, healthy and productive, renews fruiting wood and prevents the need for drastic cuts later. A tree left unpruned for several years becomes tall and crowded, bears small fruit high up and suffers more brown rot and black knot.

Plum pruning calendar

How do you summer prune a plum tree?

Summer pruning is done just after harvest, usually in July or August, while the tree is still in leaf. Its purpose is to slow growth and keep the tree small, not to shape the framework. Remove vigorous upright shoots that grew this season, shorten long new shoots by about a third to an outward-facing leaf, and thin crowded areas in the canopy. Because the tree loses leaves that would have fed the roots, summer pruning reduces vigor more than winter pruning. Keep it light, no more than about 10 to 20 percent of the leafy growth, and stop by late summer in cold climates so the tree can harden off for winter.

Year-by-year plum pruning plan

Following this plan from the start means you will rarely need heavy corrective cuts later. Mature plums need only routine thinning, renewal and height control each year.

You’ll find related varieties, pruning calendars and pest guides in the fruit tree hub.

Frequently asked questions

Reviewed October 2026. Sources: Utah State University Extension, Plums in the Home Garden; University of Georgia Extension, Home Garden Plums; University of Illinois Extension, Plums.