Pears

Home growers have two distinct pears to choose from, and the choice shapes everything that follows. European pears (Pyrus communis) — Bartlett, Bosc, Comice, d'Anjou, and the perry pears — are native to a broad range from western Europe to northern Iraq and have been cultivated for at least three thousand years. They are the classic teardrop-shaped, buttery-textured pears of Western tradition, and they have one quirk that distinguishes them from nearly every other tree fruit: they ripen off the tree, not on it. A pear left on the tree until soft becomes gritty and unpleasant; a pear picked mature-but-firm and ripened on the counter develops the smooth, melting texture that defines the species. Asian pears (Pyrus pyrifolia), native to East Asia, are crisp, round, juicy, and apple-like — eaten firm, directly from the tree.

Both groups belong to the rose family (Rosaceae) and share most of their care. Trees are typically grafted onto dwarfing rootstocks (OHxF series is most common at Raintree) to hold size to 10–18 feet, and most cultivars are not reliably self-fruitful — two varieties with overlapping bloom times produce dramatically more fruit than a single tree alone. Pears are also notably long-lived: well-cared-for trees commonly produce for 50 years or more, and some heritage trees in the Pacific Northwest exceed 150.

The single most important thing to understand about pears is fire blight. Fire blight is a bacterial disease that spreads explosively during warm, wet bloom periods, can kill an entire branch — or an entire tree — in a season, and is the primary reason European pears have a reputation as "fussy" in some regions. Variety selection is the first line of defense: cultivars vary enormously in fire blight resistance, with some (like Harrow Sweet, Magness, and most Asian pears) showing strong tolerance and others (Bartlett, in particular) being highly susceptible. The variety and disease sections below detail which cultivars to choose for your climate.

European and Asian pears are grown quite differently, and this distinction drives nearly every decision you'll make — variety selection, pollination pairing, harvest timing, and storage. Knowing which type you're working with from the start prevents the most common pear-growing frustrations.

Pear trees are grafted, and the rootstock determines mature tree size, time to first bearing, and how easily the tree can be managed long-term. Pears on standard rootstocks are famously long-lived — a well-sited standard pear can produce for 50–75 years — but they take longer to bear and require more work to prune and harvest.

Raintree carries dozens of pear cultivars across three working groups: European pears, Asian pears, and hybrid/unusual selections. The varieties below are currently part of the Raintree catalog; specific availability varies seasonally. Remember the type-separation rule from the next section: European pollinates European, Asian pollinates Asian.

Pacific Northwest recommended — European pears

Asian pears

Asian pears are eaten crisp, directly off the tree — no off-tree ripening required. They generally show stronger fire blight resistance than European pears and ripen on the tree like apples.

Most pear trees cannot set a reliable crop without pollen from a different compatible variety of the same type. Bees and other pollinators carry pollen between trees, so having two compatible trees within 10–15 feet of each other is the foundation of a productive pear planting. The single most important rule in pear pollination is type separation: European pollinates European, Asian pollinates Asian.

Choose varieties from the same bloom group, or from adjacent groups. Even a modest bloom overlap — just a few days — is usually enough for bees to do their work. More overlap is always better, especially in climates with unpredictable spring weather.

Pears need full sun — at least 8 hours of direct sun during the growing season. They are more tolerant of heavier, less-perfectly-drained soils than apples or apricots, but they still perform best in well-drained ground. Avoid frost pockets and low areas where cold air settles, as late frosts during bloom can reduce fruit set.

A soil pH in the slightly acidic to neutral range (6.0–7.0) is ideal. When planting, improve the broader planting area rather than creating a single rich hole. Keep mulch a few inches away from the trunk and maintain the graft union above soil grade.

Chill hours and hardiness

European pears are generally hardy in USDA Zones 4–9 and need approximately 600–900 chill hours, with variation by variety. Asian pears are slightly less cold-hardy (Zones 5–9) but typically need fewer chill hours — approximately 300–500 — making them well-suited to the milder parts of the PNW and other regions with warm winters.

Water young pear trees deeply while establishing — approximately 1 inch per week during active growth, adjusted for rainfall. Established pears are relatively drought-tolerant in many climates, but consistent deep watering during fruit sizing in summer noticeably improves fruit size and quality. Always water deeply and infrequently, encouraging deep root development.

Pears generally require modest fertility. A light balanced fertilizer application in early spring is usually adequate. Be cautious with nitrogen: excess nitrogen encourages the lush, succulent growth that is most susceptible to fire blight — the single greatest disease threat to pears. Monitor annual shoot growth: healthy young non-bearing trees typically grow 12–18 inches per year; bearing trees, 8–12 inches. Growth well below this range may suggest a need for modest fertilization.

Pears are most commonly trained to a central leader — one dominant main trunk with scaffold branches arranged around it in a spiral. Pears naturally grow upright, more so than apples, which means managing vertical growth and encouraging lateral fruiting branches are important recurring tasks.

Each year, remove dead, damaged, or diseased wood; strongly competing vertical shoots; crossing branches; and crowded interior growth. Spreading young upright lateral branches toward a more horizontal angle — using weights, ties, or spreaders — encourages earlier fruiting and a more open, light-filled canopy.

Annual pruning is essential for managing fire blight. An open, well-aired canopy dries faster after rain, reducing infection windows. Do not over-prune in a single year — heavy cuts stimulate exactly the kind of succulent new growth that fire blight thrives on.