Blueberry
Vaccinium corymbosum
Also known asHighbush blueberry (V. corymbosum) · Lowbush blueberry (V. angustifolium, wild) · Rabbiteye blueberry (V. virgatum, Southern) · Bilberry (V. myrtillus, distinct European species)
Environment
The bounded range this crop tolerates.
Climate and zones
- USDA zones
- 3–10 (winter low around -40°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 | 2 | 1 | 1 | 0.8 |
| vegetative | 2 | 1 | 2 | 1 |
| flowering | 1 | 1 | 2 | 1.2 |
| fruiting | 1 | 1 | 2 | 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
Feasible in large-container hydroponic systems with careful pH management. The critical requirement is acidic pH: 4.5-5.5, significantly lower than most hydroponic crops. Use a pine bark or peat-based media, or a coir/perlite mix with pH adjusted using sulfuric acid or phosphoric acid. EC 1.0-1.8 mS/cm (blueberries are light feeders; excessive fertilization causes root burn). Ammoniacal nitrogen is preferred over nitrate nitrogen for blueberries, which is unusual among hydroponic crops. Temperature: 15–25°C for growth; most varieties need winter chill (600-1000 hours below 7°C) outdoors. High light (DLI 18-25 mol/m2/day). Plants begin bearing at 2-3 years from nursery stock. Cross-pollination between two different varieties improves berry size and yield. Each mature bush produces 2–5 kg of berries annually. For aquaponics integration, the acidic pH requirement makes blueberries incompatible with most fish systems (which run pH 6.5-7.5). However, separate containers irrigated with pH-adjusted aquaponic effluent can work. The high retail value ($8-20/kg) justifies the extra management effort.
Notable varieties
| Cultivar | Type | Origin | Days | Notes |
|---|---|---|---|---|
| Bluecrop | open pollinated | 730 | Northern highbush, USDA zones 4-7. The most-planted commercial blueberry worldwide. Reliable mid-season harvest, good flavor, productive. The variety most home garden 'blueberries' actually are. | |
| Duke | open pollinated | 700 | Northern highbush, very early. Cold-tolerant blossoms (handles late frosts that damage other varieties). Plant Duke + Bluecrop for staggered harvest. | |
| Pink Lemonade | hybrid | USDA, 2007 | 730 | Pink-fruited hybrid (rabbiteye × highbush). Productive in zones 4-9; the widest range of any cultivated blueberry. Novelty value plus actual reliability. |
| Tifblue (Rabbiteye) | open pollinated | USDA / U. of Georgia, 1955 | 730 | Rabbiteye type, zones 7-9. The most-planted Southern US blueberry. Heat and humidity tolerant where Northern highbush varieties fail. Larger, more vigorous plants (2.5-3 m vs 1.5 m highbush). |
| Top Hat | open pollinated | 730 | Dwarf lowbush variety, 50-60 cm tall, container-suited. Self-fertile. The blueberry to grow on a patio or in a small space. |