Bradford pears are famous for two things: clouds of white flowers in early spring, and splitting in half in a storm. The second problem comes from the way the tree grows. Pruning can help a young Bradford pear build a stronger frame, but it has limits. For an older tree, the honest answer is often that pruning reduces the risk without removing it.

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The short answer: prune a Bradford pear while it is young. Choose one central trunk, then remove competing upright stems and thin out branches that crowd each other along the trunk, so the main branches end up at least 12 inches apart vertically. Remove dead and broken wood any time; do structural cuts in late winter before the spring flush. Never top the tree. The Georgia Forestry Commission says a Bradford pear more than about 10 years old is unlikely to be pruned out of its structural problems, so an older tree with cracks or splits is usually better removed.

Why Bradford pears split

The University of Florida IFAS Extension sums it up: the major problem with ‘Bradford’ has been too many upright branches growing too closely together on the trunk. NC State Extension describes branches that grow at upright angles with weak crotches that break with age, wind and ice, and notes that ‘Bradford’ develops tight crotches likely to split in heavy wind and rain.

The Georgia Forestry Commission explains the mechanism. The tree’s rounded “lollipop” crown comes from many branches growing from a short stretch of trunk. As they thicken, they crowd each other, weakening their attachments. Bradford pears can lose as much as half their crown in a single failure, sometimes without any recent storm.

Before you prune: should you keep it?

It is worth knowing what you are pruning. The Morton Arboretum lists Callery pear, the species ‘Bradford’ belongs to, as invasive: cultivars cross with each other and other pears, birds spread the seed, and thorny thickets crowd out native plants. NC State Extension suggests native alternatives such as Eastern redbud, flowering dogwood, serviceberry or American plum. Illinois will classify Callery pear as an exotic weed from January 1, 2028, which prohibits its sale there.

If your tree is young and healthy, structural pruning can buy it many good years. If it is older and already cracking, put the money toward a replacement.

Pruning a young Bradford pear

UF IFAS recommends pruning early in the tree’s life to space lateral branches along a central trunk. In practice:

Pick a leader. Choose the strongest, straightest central stem as the trunk.
Deal with competitors. Remove upright stems that compete with the leader, or shorten them so the leader takes over.
Space the main branches. The Georgia Forestry Commission recommends scaffold branches arranged around the trunk with at least 12 inches of vertical distance between them. Where two branches grow from nearly the same spot, keep the better-placed one.
Do it over several years. Remove a little each year rather than a lot at once.

UF IFAS is candid that this is not easy, that a skilled pruning crew helps, and that well-pruned trees can still look misshapen. Without pruning, though, the tree has a short life.

Pruning an older Bradford pear

The Georgia Forestry Commission says it is unlikely a tree more than 10 years old can be correctively pruned to eliminate structural failure. You can still reduce risk:

Remove dead, broken and rubbing branches.
Thin out crowded upright shoots in the center.
Reduce the length of heavy limbs over a house, drive or play area to take weight off weak unions.
Look for cracks in the bark below branch unions. The Georgia Forestry Commission notes these cracks can sometimes be seen before a failure.

Once a major limb has torn away, the Georgia Forestry Commission says the remaining trunk is usually weakened, and the options come down to living with the risk or removing the tree.

When to prune

The ISA notes that light pruning of dead or broken limbs can be done any time, and that growth and wound closure are maximized when pruning happens before the spring growth flush. For a Bradford pear, late winter is a good time for structural cuts, and you can see the branch structure clearly before the leaves appear. Heavy pruning just after the spring flush should be avoided.

Callery pear can get fire blight, NC State notes. If you see blackened, hooked shoot tips, read how to treat fire blight on pear trees for where to cut and how to clean your tools.

What not to do

Do not top the tree. The Georgia Forestry Commission notes that topping creates more growth and more weight on the branches over time.
Do not leave stubs or flush cuts. Cut just outside the branch collar.
Do not tear the bark. On heavy limbs, use three cuts: an undercut, a top cut farther out to drop the limb, then a final cut at the collar.

Call a certified arborist

Large limbs, trees near the house, and any tree with cracks belong with a certified arborist. The ISA Find an Arborist directory lists professionals near you.

Sources

Pyrus calleryana 'Bradford': 'Bradford' Callery Pear (ST537), University of Florida IFAS Extension
Salvaging the Bradford Pear, Georgia Forestry Commission
Pyrus calleryana (Callery Pear), NC State Extension Gardener Plant Toolbox
Callery Pear, The Morton Arboretum
Pruning Your Trees, International Society of Arboriculture, TreesAreGood.org

Top photo: Michael Rivera, CC BY-SA 4.0, via Wikimedia Commons

How to Prune a Bradford Pear Tree