Saskatoon
Amelanchier alnifolia
Also known asSaskatoon berry · Serviceberry · Juneberry · Pacific serviceberry · Western serviceberry · Pigeon berry
Environment
The bounded range this crop tolerates.
Climate and zones
- USDA zones
- 2–7 (winter low around -46°C)
- Frost
- very hardy (survives deep cold)
- Season
- cool (spring/fall)
Growing systems
Root mass: 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 | 0.7 |
| vegetative | 2 | 1 | 2 | 1.3 |
| flowering | 1 | 1 | 2 | 1.4 |
| fruiting | 1 | 1 | 3 | 1.4 |
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 cold-hardy fruiting shrub for outdoor aquaponics integration in northern climates. Container growing (30 L) or in-ground near the system. EC 1.5-2.5 mS/cm. pH 5.5-7.0. Temperature: extremely cold-hardy (zones 2-7); needs winter chill. Full sun to partial shade (DLI 14-22 mol/m2/day). Self-fertile; a single bush produces fruit, though cross-pollination improves yield. Fruiting begins at 2-4 years from nursery stock. Each mature bush produces 3–8 kg of berries annually. The berries ripen over a 2-3 week period in early to midsummer. Harvest when berries are fully dark purple and sweet. Birds are the primary competitor for the harvest; netting is recommended. The berries freeze well and make excellent jam (the natural pectin content is moderate, so add commercial pectin for a firm set). For northern aquaponics growers, saskatoon berries fill a fruit production niche that blueberries and blackberries can't reach in extreme cold climates.
Notable varieties
| Cultivar | Type | Days | Notes |
|---|---|---|---|
| Smoky | open pollinated | 1095 | 1952 Alberta selection, the standard commercial saskatoon. Medium-large dark blue berries, sweet mild flavor, high yields. Reaches 2-3 m. The variety most prairie growers plant first. Hardy zone 2. |
| Northline | open pollinated | 1095 | 1960s Alberta selection. Slightly larger berries than Smoky, similar flavor. More suckering habit, useful for hedge plantings or natural-area edges, less convenient as a single-bush specimen. Hardy zone 2. |
| Honeywood | open pollinated | 1095 | Saskatchewan selection. Late-ripening, extends the harvest by 2-3 weeks past Smoky. Larger sweet berries. Excellent fresh-eating quality. Hardy zone 2-3. |
| Thiessen | open pollinated | 1095 | Saskatchewan selection, the earliest-ripening commercial saskatoon. Large berries, slight tang. Useful for staggered harvest when planted with Smoky and Honeywood. Hardy zone 2. |