Pear
Pyrus communis
Also known asEuropean pear · Common pear · Pyrus · Poire · Pera
Environment
The bounded range this crop tolerates.
Climate and zones
- USDA zones
- 4–9 (winter low around -34°C)
- Frost
- very hardy (survives deep cold)
- Season
- cool (spring/fall)
Growing systems
Root mass: very heavy. Thin-channel systems can't hold this crop.
Growing media
| Medium | pH effect | Retention | Bacterial surface |
|---|---|---|---|
| Soil-based mix (Potting soil) | varies | high | high |
Nutrient demand by stage
NPK ratios are relative weights. EC targets shift through the plant's life.
| Stage | N | P | K | EC (mS/cm) |
|---|---|---|---|---|
| seedling | 1 | 1 | 1 | 0.8 |
| vegetative | 2 | 1 | 2 | 1.4 |
| flowering | 1 | 1 | 3 | 1.6 |
| fruiting | 1 | 1 | 3 | 1.6 |
Companion-growing notes
- High transpiration. Regular reservoir top-ups needed during fruiting.
Aquaponics suitability
Not recommended
Fish waste alone doesn't supply enough of what this crop demands. Grows in hybrid systems with supplemental dosing, but expect active management.
Care notes
A long-lived fruit tree for outdoor aquaponics integration. Container growing (50 L) on dwarfing rootstock (Quince A, OH x F 87, OH x F 333). EC 1.5-2.5 mS/cm. pH 6.0-7.0. Most European pears require a pollinizer (a different variety that blooms at the same time); 'Bartlett' and 'Anjou' pollinate each other. Asian pears are partially self-fertile but produce better with cross-pollination. Full sun (DLI 18-25 mol/m2/day). Chilling requirement: 400-900 hours depending on variety. Fruiting begins at 3-5 years from grafted stock. Each mature container tree produces 5–15 kg. Fire blight (Erwinia amylovora) is the most serious disease, killing branches rapidly; resistant varieties ('Harrow Sweet', 'Moonglow') reduce risk. Pear trees are longer-lived than most other fruit trees (50-100+ years). For small-scale growers, the combination of high fruit quality, long tree lifespan, and relatively low maintenance (less spraying than apples or peaches) makes pear one of the best long-term tree fruit investments. Pear trees trained as espaliered forms (flat against a wall or wire framework) are an efficient way to grow pears in limited space, including alongside vertical aquaponics structures.
Notable varieties
| Cultivar | Type | Days | Notes |
|---|---|---|---|
| Bartlett (Williams) | open pollinated | 1825 | 1770 English seedling, the most widely grown pear worldwide. Classic green-yellow pear, melting flesh, ripens August-September. Zones 5-8. Susceptible to fire blight, which is its main weakness in humid eastern US. Incompatible with Quince rootstock without interstem. Self-unfruitful, needs pollinator. |
| Bosc | open pollinated | 1825 | Belgian 1807 cultivar. Russeted brown skin, firm dense flesh, holds shape well in cooking which is why it's the baking and poaching pear. Zones 5-8. Late season harvest. More fire-blight resistant than Bartlett. |
| Anjou (D'Anjou) | open pollinated | 1825 | Belgian 1850s cultivar. Green or red-skinned, sweet, stores 6+ months in cold. Zones 5-8. The supermarket winter pear. Late harvest, eats best after several weeks of cold storage. |
| Shinseiki (Asian) | open pollinated | 1095 | Japanese Asian pear (Pyrus pyrifolia). Yellow-skinned apple-shaped fruit with crisp white flesh, sweet, eats fresh off the tree (no post-harvest ripening needed). Zones 5-9. Earlier to fruit than European pears (3-4 years), more disease-resistant, more reliable for home growers. |
| Comice | open pollinated | 1825 | French 1849 cultivar. Considered the highest-quality eating pear by most growers, melting and aromatic. Zones 5-8. Less productive and more disease-prone than Bartlett, but the flavor justifies it for home orchards. The pear in most premium gift boxes. |