Blueberry
Vaccinium corymbosum
Also known as: Highbush blueberry (V. corymbosum), Lowbush blueberry (V. angustifolium, wild), Rabbiteye blueberry (V. virgatum, Southern), Bilberry (V. myrtillus, distinct European species)
Quick facts
- Category
- fruiting
- Difficulty
- intermediate
- Days to harvest
- 730 to 1095 days
- Harvest type
- continuous production over weeks or months
- Spacing
- 150 cm between plants
Environment
- Temperature
- 0–28°C
- pH
- 4.5 to 5.5
- EC (hydroponic)
- 0.8 to 1.4 mS/cm
- Daily light
- 18 to 28 mol/m²/day
Climate and zones
- USDA zones
- 3 to 10 (winter low around -40°C or warmer)
- Frost tolerance
- very hardy (survives deep cold)
- Season
- cool (spring and fall crops)
Viable growing environments:
- outdoor year-round (in zone)
- outdoor in growing season (annual)
- unheated greenhouse / hoop house
USDA zone bounds reflect outdoor year-round survival. Anywhere outside the bounded zone range, this crop still grows as an annual in the warm months (outdoor_seasonal), under cover (greenhouse), or indoors under lights.
Growing systems
Blueberry works in:
- media bed (ebb and flow)
- soil bed
Root mass is heavy - thin-channel systems (NFT, vertical towers) can't hold this crop mechanically, hence the system list above.
Growing media
The substrate the roots sit in. Choice depends on the system (clay pebbles don't fit NFT channels; rockwool isn't used in media beds) and the crop (blueberry works in the media listed below).
| Medium | pH effect | Water retention | Bacterial surface |
|---|---|---|---|
| Soil-based mix (Potting soil) | varies by source | high | high |
Bacterial surface area matters for aquaponics: clay pebbles, lava rock, and pumice double as biofilter substrate. Low-surface media (rockwool, perlite, pea gravel) work in hydroponics but need a separate biofilter in aquaponics.
Nutrient demand by stage
NPK ratios are relative weights at each growth stage; the nutrient mix calculator scales them to absolute grams or ml. EC targets shift through the plant's life: seedlings need a much lighter solution than fruiting adults.
| Stage | N | P | K | EC target (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 for pure aquaponics. Fish waste alone doesn't provide enough of the nutrients this crop demands (typically potassium, calcium, or boron). It can be grown in a hybrid system where the reservoir is supplemented with hydroponic-style nutrients, but expect to dose actively.
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
A starting shortlist of cultivars worth knowing about. Not exhaustive: the seed catalogs list hundreds of named varieties. These are the ones home growers commonly choose between.
| Cultivar | Type | Breeder / 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. |
Verified against: rhs-uk, u-of-minnesota-extension, u-of-georgia-extension, rutgers-cooperative-extension. Last reviewed 2026-05-15.