Saskatoon
Amelanchier alnifolia
Also known asSaskatoon berry · Serviceberry · Juneberry · Pacific serviceberry · Western serviceberry · Western shadbush
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. Grow in a container (30 L) or in-ground near the system. EC 1.0-1.6 mS/cm. pH 6.0-7.5. Temperature: extremely cold-hardy (zones 2-7); needs winter chill. Full sun to partial shade (DLI 18-28 mol/m2/day). Self-fertile, so a single bush sets fruit, though cross-pollination improves yield. Fruiting begins at 2-4 years from nursery stock, and a mature bush yields 3–8 kg of berries a year. The berries ripen over 2-3 weeks in early to midsummer; harvest when fully dark purple and sweet. Birds are the main competitor, so netting helps. The berries freeze well and make excellent jam, though with only moderate natural pectin, so add commercial pectin for a firm set. For northern aquaponics growers, saskatoons fill a fruit niche that blueberries and blackberries cannot reach in extreme cold.
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. |