Pear Tree Guide: Choosing, Pollinating, Growing and Picking Pears

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At a glance

What a pear tree is (and what it looks like)

Pears are deciduous trees in the rose family, close relatives of apples and quince. Two groups are grown for fruit:

• European pears (Pyrus communis): the classic pear shape and buttery texture, such as 'Bartlett', 'Bosc' and 'Seckel'.
• Asian pears (P. pyrifolia and hybrids): usually round, crisp and juicy like an apple.

Identification

Pear trees have an upright, often pyramidal habit; glossy, oval leaves with fine teeth and a pointed tip; clusters of white five-petaled flowers in early spring, usually just ahead of or with the leaves; and gray bark that becomes furrowed and blocky with age. Fruiting spurs, like apple spurs, carry the flowers for several years.

European vs Asian pears

Both are grown the same way in most respects: same site, pruning and pest list. The differences are in harvest and in cultivar choice. Thinning timing follows Kentucky Extension's home fruit guide.

Choosing cultivars: fire blight comes first

Fire blight, a bacterial disease that blackens blossoms and shoots and can kill whole limbs, is the main reason backyard pears fail in humid regions. UGA notes that fire blight is why most US pear production moved to the drier Pacific Northwest, and UConn says pears are relatively easy to grow if the proper varieties are selected, so cultivar resistance is the most important decision you make.

• For Georgia and the Southeast, UGA's Home Garden Pears rates 'Orient', 'Carrick', 'Waite', 'Baldwin' and 'Warren' as resistant to blight, while 'Kieffer' can be subject to blight in wet years.
• UConn's pear fact sheet lists 'Seckel' (a small dessert pear) as offering good fire blight resistance, along with 'Maxine', 'Harrow Delight', 'Magness', 'Moonglow' and 'Kieffer'.
• 'Bartlett' has excellent fruit but is susceptible; UGA says it is not adapted to the Southeast and should not be planted in Georgia.

Resistant means less damage, not immunity. In wet, warm springs even resistant trees can show strikes. The full management plan is on the fire blight on pears page.

Rootstocks

Pears on seedling rootstock become large, long-lived trees; UGA notes trees 50 years old that still produce. Per Washington State University, Old Home × Farmingdale (OHxF) is the most common rootstock in North America, valued for fire blight resistance and cold hardiness, though trees on it tend to be large. Quince rootstocks dwarf the tree and bring it into bearing early, but most quince selections are not winter hardy and quince is incompatible with many cultivars, including 'Bartlett' and 'Bosc', without an interstem. Note that South Carolina's ban also covers pears grown on Callery pear (Pyrus calleryana) rootstock. The fruit tree rootstock guide compares them.

Pear tree pollination

Most pears need cross-pollination from a different cultivar that blooms at the same time. UGA lists 'Orient', 'Baldwin', 'Kieffer' and 'Spalding' as at least partially self-fruitful, but planting two compatible cultivars is the safer plan.

• Plant two cultivars within easy bee range of each other.
• Watch for incompatible pairs. Per UConn, 'Bartlett' and 'Seckel' do not pollinize each other.
• Some cultivars are poor pollen donors. Per UGA, 'Magness' and 'Waite' produce sterile pollen, so they need a partner but cannot serve as one; plant 'Orient' or two other cultivars with them.
• Asian and European pears can pollinize each other when their bloom overlaps, per UConn, but many Asian pears bloom earlier, and UGA says information is limited, so it recommends planting several Asian cultivars together.
• Protect the bees that do the work by avoiding insecticides during bloom.

Bloom groups and compatible partners for pears, apples, plums and cherries are charted in fruit tree pollination pairs.

Climate and zones

European pears are among the more cold-hardy tree fruits: NC State lists them for zones 4–8, and UConn notes some varieties are cold hardy to -40°F. NC State lists Asian pears for zones 5–8. In the warm, humid Southeast, fire blight and chill hours matter more than cold: choose cultivars on your state's list, such as those in UGA's guide, rather than catalog favorites bred for the Pacific Northwest. Per UGA, pears bloom one to several weeks before apples, so they are even more exposed to spring frost; plant where cold air drains away.

How to plant a pear tree

1. Site: full sun most or all of the day, good air movement and well-drained soil. UConn notes pears tolerate heavier soils than apples, but not standing water.
2. Timing: plant bare-root trees while dormant. If planting is delayed, UGA advises heeling them in with soil over the roots and never letting the roots dry out.
3. Depth: keep the graft union above the soil line.
4. Spacing: UGA spaces trees 20 feet apart; NC State suggests 10–15 feet for Asian pears. Check the nursery's rating for your rootstock.
5. Head back: UGA cuts unbranched whips back to 24–30 inches at planting to start low scaffold branches.
6. Water and mulch, and protect the trunk from rodents and string trimmers.

Pears are slower to bear than peaches. NC State notes Asian pears bear around the third or fourth year; dwarfing rootstocks bring trees into bearing sooner.

Pear tree care: water, fertilizer and pruning

Water

Water young trees deeply in dry weather for their first seasons. NC State notes established European pears tolerate occasionally dry soil.

Fertilizer

Test the soil before planting; UGA puts the best pH at 5.9–6.5. UGA splits each year's fertilizer, half before growth begins and half after fruit set, skips the second half if no fruit sets, and cuts back if trees make too much growth: shoot growth on bearing trees should average only about 6 inches a year. NC State warns that excess nitrogen makes pears more susceptible to fire blight.

Pruning

Pears grow naturally upright with narrow branch angles. Per UGA, after the first season remove limbs lower than 18 inches and keep four to six scaffolds; after the second season, tie lower scaffolds down to about 45 degrees. During dormant pruning, remove crossing, broken and diseased limbs and vigorous vertical sprouts, and keep the center open for air and light. NC State suggests letting Asian pears develop multiple trunks instead of a central leader to limit losses to fire blight. Methods are in how to prune fruit trees, and summer pruning covers spur management on apples and pears.

Thinning

Per Kentucky Extension, thin Asian pears early, keeping the middle (roundest) fruit in each cluster and one or two fruits per spur. Pears can be thinned within about 60 days of full bloom.

When to pick pears

European pears: pick hard, ripen indoors

Per UGA, pears must be harvested before they are ripe for the highest quality. Picked too early they are undersized and lack flavor; picked too late they ripen quickly, turn gritty and are subject to core breakdown. Signs of picking maturity:

• The lenticels (small dots on the skin) turn from white to brown and shallow.
• The skin between the lenticels becomes lighter green.

Then let the fruit ripen off the tree; UConn notes European pears are harvested green and stored until ripe.

Asian pears: ripen on the tree

Per UConn, Asian pears taste best when allowed to ripen on the tree. Pick when the skin has reached its mature color (often yellowish green to golden russet) and the fruit tastes sweet.

Pests and problems

• Fire blight: blackened blossoms and shoot tips bent into a shepherd's crook. Prune out strikes well below visible damage (6–8 inches per UGA, 12 inches per UConn) and disinfect tools between cuts. See fire blight on pear and apple.
• Pear psylla and codling moth: UConn lists both among the major pear pests, along with pear leafcurling midge.
• Pear leaf spot and scab: UGA names pear leaf spot one of the two most common pear diseases; it starts as small purplish-black spots on leaves or fruit.
• No fruit: usually a missing or incompatible pollinizer, a spring frost, or a tree that is still too young.

Bradford and Callery pear: the ornamental to avoid

The 'Bradford' pear and other ornamental Callery pears (Pyrus calleryana) are not fruit trees. Per University of Illinois Extension, Callery pear has become invasive in native habitats and abandoned fields: cultivars cross-pollinate, birds spread the seed, and naturalized trees typically have spines. 'Bradford' also splits in high winds and storms because of its narrow crotch angles.

How to recognize it: per Illinois Extension, clusters of white, five-petaled flowers about ¾ inch across with a strong, unpleasant odor; round to ovate leaves up to 3 inches long with a thick waxy surface and finely toothed edges; and fruit about ½ inch across, green to brown with small pale spots.

Some states now restrict it. Clemson University reported that Ohio's sales ban took effect January 1, 2023, and South Carolina's on October 1, 2024; Illinois Extension notes Pennsylvania also banned its sale. Don't plant it; for a spring-flowering tree, Illinois Extension suggests natives such as serviceberry or eastern redbud. See best trees for small yards for options that fit where a Bradford pear would go.

Common mistakes

Frequently asked

Does a pear tree need a pollinator?

Most do. Plant a second, compatible cultivar that blooms at the same time; 'Bartlett' and 'Seckel' don't pollinize each other, and 'Magness' and 'Waite' produce sterile pollen. UGA lists a few cultivars, such as 'Orient' and 'Kieffer', as at least partially self-fruitful.

How long does a pear tree take to bear fruit?

Pears are slower than peaches. NC State notes Asian pears bear around the third or fourth year; trees on dwarfing rootstocks often start sooner, and standard trees on seedling roots take longer.

When should you prune a pear tree?

Do structural pruning while the tree is dormant, removing crossing, broken and diseased limbs and vigorous vertical sprouts. Remove fire blight strikes as soon as they appear, cutting well below the infection and disinfecting tools between cuts.

How big does a pear tree get?

NC State lists the European pear species at 40 to 50 feet and Asian pear at 20 to 40 feet, depending on rootstock. Trees on dwarfing rootstocks stay much smaller and are easier to prune and harvest.

What does a pear tree look like?

A pear tree has an upright crown, glossy oval leaves with serrated edges, clusters of white five-petaled flowers in spring, and smooth gray bark that becomes blocky or furrowed with age. Ornamental Bradford pears look similar in bloom but have a strong, unpleasant flower odor and fruit only about half an inch across.

Why are Bradford pear trees bad?

Callery pears, including 'Bradford', cross-pollinate with other pears, and birds spread the seed into natural areas, where they crowd out native plants. 'Bradford' trees also split easily in storms. Ohio, South Carolina and Pennsylvania have banned their sale.

Can you grow a pear tree from seed?

You can, but the seedling will not produce the same pear as its parent and may take many years to fruit. Named pears are grafted onto rootstocks so the fruit is predictable and the tree size is controlled.

Sources

1. Home Garden Pears (C 742), University of Georgia Cooperative Extension
2. Pears, UConn Home & Garden Education Center
3. Invasive Callery Pear, University of Illinois Extension
4. Invasive Bradford pear, 3 other species to be banned for sale in SC, Clemson University News
5. Pyrus communis (Common Pear), NC State Extension Gardener Plant Toolbox
6. Pyrus pyrifolia (Asian Pear), NC State Extension Gardener Plant Toolbox
7. Rootstocks for Pear, Washington State University Tree Fruit
8. Growing Tree Fruits (Kentucky Master Gardener Manual, HO-104), University of Kentucky Cooperative Extension

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