Bartlett is the pear most Americans picture when they think of pears: a golden-green, bell-shaped fruit that turns buttery and juicy when ripe. It is the leading pear for canning and one of the best for fresh eating. Outside North America it is usually sold as Williams, or Williams’ Bon Chrétien. This guide explains how to grow a Bartlett tree, what it needs to set fruit, how to manage fire blight, and the picking and ripening steps that decide whether you get sweet pears or gritty ones.
Bartlett pear quick facts
| Factor | What to know |
|---|---|
| Hardiness | Typically USDA zones 5 to 8 |
| Size | Standard 15 to 25 feet, semi-dwarf about 12 to 15 feet, dwarf about 8 to 10 feet |
| Pollination | Partly self-fruitful, but crops far better with a second pear nearby |
| Bloom | Early to mid spring, so frost can be a risk |
| First fruit | About 3 to 5 years, depending on rootstock |
| Harvest | Late summer, often August into September |
| Main weakness | Fire blight susceptibility |
Green Bartlett vs red Bartlett
Red Bartlett is a color variation of the same pear. Its skin is deep red instead of green, and the flesh and flavor are very similar. Green Bartlett changes from green to yellow as it ripens, which is a handy ripeness clue. Red Bartlett does not change color as clearly, so you have to rely on feel. Both grow the same way, and both are good for fresh eating and cooking.
Pollination: how many trees do you need?
Utah State University Extension’s guide to growing pears in the home orchard calls Bartlett the most widely grown pear, used for canning and fresh eating, and describes it as partially self-fruitful, with yields that increase when another pear cultivar grows nearby. It lists D’Anjou as self-fruitful and often used as a pollinator. Gardeners often pair Bartlett with D’Anjou, Bosc or Comice. Check the bloom group on the nursery tag or a local extension pollination chart, since compatibility and timing vary. Two dwarf trees in a small yard can be better than one standard tree. Our guide to types of pears compares the main varieties, and Asian types such as nashi pear bloom in a similar window but are not always compatible with European pears, so ask your nursery.
Planting a Bartlett pear tree
- Pick a sunny site. Full sun and good air flow. Avoid frost pockets where cold air settles, because pears bloom early.
- Prepare the soil. Pears tolerate heavier soil than peaches but not standing water. A pH of about 6.0 to 7.0 suits them.
- Space the trees. USU says standard-rootstock trees grow about 25 feet tall, that semi-dwarf OH x F rootstocks reach 70 to 80 percent of standard size, and that you should allow about 150 square feet per mature tree, since the canopy radius is 8 to 10 feet depending on rootstock and training. Use the plant spacing calculator to set distances for your rootstock size.
- Plant at the right depth. Keep the graft union 2 to 3 inches above the final soil line. Place any stake 2 to 3 inches from the trunk and keep grass and weeds at least 3 feet from the trunk.
- Water and mulch. Water deeply after planting and add a 2 to 4 inch mulch ring away from the trunk. Estimate how much with the mulch calculator.
Watering
USU recommends 2 to 3 gallons a couple of times a week in the first year, keeping soil moist 6 to 8 inches deep near the tree. In later years, give 1 to 3 inches of water per week in summer and into fall, preferably as a deep soak to 18 to 24 inches every 7 to 10 days, and avoid sprinklers that wet the foliage and blossoms, which encourages fire blight. The garden watering calculator can help you turn that into minutes.
Fertilizing: go easy on nitrogen
Too much nitrogen pushes soft, leafy growth that fire blight loves. USU gives a practical test: young trees (three years or less) should add 12 to 15 inches of shoot growth per year, and if shoots exceed 24 inches you should skip nitrogen. Bearing trees over four years old should grow about a foot a year, excluding water sprouts; if they fall short, apply 1 to 2 cups of a 20-0-0 fertilizer in early spring. Do not fertilize after mid-July, so growth can harden before winter. If soil or tissue tests show a phosphorus or potassium deficiency, use a balanced fertilizer. See our fruit tree fertilizer guide.
Pruning and thinning
USU says to cut an unbranched tree 36 to 40 inches above the soil line at planting, to choose the uppermost branch as the central leader the first early spring, and to keep the best four or five lateral branches as scaffolds. Prune in late winter to a central or modified leader with wide-angle branches. See our pear pruning guide and the loppers guide for tools.
Thin fruit 2 to 3 weeks after petal fall, leaving the largest pear in each cluster, and space remaining fruit 6 to 8 inches apart. USU warns that thinning more than a month after petal fall is ineffective. Thinning gives bigger pears and keeps branches from breaking under the load.
Fire blight: the main threat
Fire blight is a bacterial disease that blackens shoot tips, which often curl into a shepherd’s crook, and makes leaves look scorched. It develops in warm, rainy weather during bloom. USU notes that most fire blight in Utah resists antibiotics and that “removing infected wood is the best treatment for reducing the spread of fire blight.” If you see it, prune out infected branches in dry weather, cutting well below the visible damage, usually 8 to 12 inches into healthy wood, and sanitize your pruners between cuts. Remove and dispose of the cuttings rather than composting them. Ask your extension office about local recommendations before using any spray. If your area has heavy fire blight pressure, consider a more tolerant variety. See our full guide to fire blight on pear trees.
Other pests
USU lists codling moth, pear psylla and mites as common pear pests. Use the pest identifier to confirm what you are seeing before choosing a control, and follow the label of any product.
When to pick Bartlett pears
Unlike apples, European pears such as Bartlett are picked mature but still firm and ripened off the tree. Fruit left on the tree to ripen often turns gritty and soft at the core while the outside still looks fine. USU lists the signs of maturity: the skin changes from dark green to a lighter green and the lenticels (the small dots) darken. Pick when the seeds are turning brown and the pear separates easily when you lift and gently twist it. A good test is to tilt the fruit upward to horizontal: a mature pear snaps free from the spur.
Commercial packers use numbers. The UC Davis Postharvest Technology Center sets Bartlett maturity by minimum soluble solids and maximum flesh firmness, for example no more than about 20 pounds-force at 10 percent soluble solids for fruit 2⅜ to 2½ inches across, and it counts yellowish-green skin as mature without limits. Eating-ripe pears measure only about 2 to 4 pounds-force, which is soft and juicy. You will not need a pressure tester at home, but it explains why a mature pear still feels rock hard when you pick it.
How to ripen Bartlett pears
- Leave firm pears at normal room temperature, around 65 to 75°F.
- Check each day. Most Bartlett ripen in about 4 to 7 days. UC Davis reports that fruit given a conditioning treatment ripens uniformly in 4 to 6 days, and that fruit cold stored for about three weeks ripens without conditioning.
- Press gently near the stem. When the neck gives slightly, the pear is ripe. Green Bartlett will also shift toward yellow.
- Move ripe pears to the refrigerator to hold them a few more days, and eat soon.
USU offers two useful tips: refrigerate Bartlett for a day or two before ripening for immediate use, and for canning, ripen them in a cool box under a blanket or newspaper. A paper bag speeds ripening for store-bought pears.
How long do Bartlett pears keep?
UC Davis gives optimum storage at 30 to 32°F with 90 to 95 percent relative humidity, which keeps pears up to about three months in air and up to six months in controlled atmosphere. A home refrigerator is warmer, so expect a few weeks at best for Bartlett, which is a summer pear. USU notes that winter pears such as Anjou, Comice and Bosc keep refrigerated for two to three months after harvest, then ripen at room temperature, making them better for long storage than Bartlett.
Ways to use Bartlett pears
Eat them fresh when ripe and juicy. They also make good pear sauce and pear butter, cook down well for canning (see water bath canning for beginners and how to make jam), and work in baking when slightly underripe. For poaching where the fruit must keep its shape, firmer varieties such as Bosc are a better choice.
A year in the life of a Bartlett tree
- Late winter: prune to a strong central leader, remove fire blight strikes from last year and any crossing branches. Sanitize tools between cuts.
- Early spring: apply nitrogen only if growth is below the targets above. Watch the weather at bloom; a frost can take the whole crop.
- Bloom: avoid overhead sprinklers, and protect pollinators by not spraying open flowers.
- 2 to 3 weeks after petal fall: thin to the largest fruit per cluster, 6 to 8 inches apart.
- Summer: water deeply, check shoot tips for fire blight, and bag or trap if codling moth is a problem in your area.
- Late summer: test-pick, using the lift-and-twist and color signs, and harvest in several passes.
- Fall: clean up fallen fruit and leaves, mulch, and stop fertilizing well before this point.
Written notes on bloom date, thinning date and first pick date for your own tree are more useful than any general calendar, because pear timing moves a couple of weeks between cool and warm climates.
Common Bartlett problems
- Gritty fruit: left on the tree too long or picked too late.
- No fruit: no compatible pollinator, frost at bloom, or a young tree.
- Blackened shoot tips: fire blight; prune out and sanitize.
- Small fruit: too many pears on the branch; thin earlier.
- Brown, soft cores: overripe fruit or storage that was too warm.
Safety and legal note: If you use any spray, the product label is the law: use only products labeled for pears and follow the label on rates, timing and protective gear. Rules vary by state. Also avoid planting ornamental Bradford or Callery pear, which is invasive and banned or being phased out in several states. Choose a fruiting variety such as Bartlett instead. Use a tested recipe when canning pears.
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Frequently asked questions
Are Bartlett pears self-pollinating?
Partly. A single tree can set some fruit, but a second pear variety nearby gives a better crop.
Partly. A single tree can set some fruit, but a second pear variety nearby gives a better crop.
Why are my Bartlett pears gritty?
Usually the fruit was left on the tree too long or picked too late. Pick mature and ripen off the tree.
Usually the fruit was left on the tree too long or picked too late. Pick mature and ripen off the tree.
Is a Williams pear the same as a Bartlett pear?
Yes. Williams is the name used in much of the world for the pear sold as Bartlett in North America.
Yes. Williams is the name used in much of the world for the pear sold as Bartlett in North America.
How long until a Bartlett tree bears fruit?
Typically 3 to 5 years. Dwarf trees often start sooner than standard trees.
Typically 3 to 5 years. Dwarf trees often start sooner than standard trees.
When do you thin Bartlett pears?
2 to 3 weeks after petal fall, leaving the largest fruit and spacing them 6 to 8 inches apart.
2 to 3 weeks after petal fall, leaving the largest fruit and spacing them 6 to 8 inches apart.
Do Bartlett pears ripen on the tree?
No. European pears are picked mature but hard and ripened at room temperature.
No. European pears are picked mature but hard and ripened at room temperature.
Bartlett is picked hard and ripened indoors; see when to pick pears for the tilt test and ripening times. Looking for the next tree to plant? Our guide to growing fruit trees at home compares options by climate and space.
Reviewed October 2026. Varieties and conditions vary by region. Sources: Utah State University Extension, How to Grow Pears in Your Home Orchard; UC Davis Postharvest Technology Center, Pear: Maturity and Quality.
