Blueberry Bush Guide: How to Plant and Grow Blueberries

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At a glance

Which blueberry bush fits your zone

"Blueberry bush" covers several types with different cold tolerance and winter-chill needs. Match the type to your climate first; the cultivar comes second.

Highbush blueberry is native to eastern North America (NC State Extension), which makes it a fruiting shrub that also works in a native planting. For named cultivars by type and region, see best blueberry varieties: highbush, lowbush, rabbiteye.

Soil pH: the make-or-break step

Most failed blueberry plantings fail on soil pH. University of Minnesota Extension says blueberries need acidic, well-drained, loose soil high in organic matter, with an optimum pH of 4.0 to 5.0, and that soil above pH 5.5 is not acidic enough. Other sources set the target at 4.5 to 5.5 (Michigan State University Extension; University of Maryland Extension) or 4.5 to 5.0 (Penn State Extension). MSU notes that in the neutral soils (pH 6.5 to 7) most plants prefer, blueberries turn yellow and grow poorly: iron chlorosis shows as yellow leaves with green veins on young growth.

1. Test before you buy plants. Michigan State University Extension and Penn State Extension both recommend a soil test as the first step. It tells you the pH and how much the soil resists change.
2. Lower pH with elemental sulfur, a season ahead. UMN advises applying sulfur the fall before spring planting because it takes months to act; Clemson says to apply it at least three months before planting. Rates depend on your starting pH and soil type. Oregon State's acidifying guide lays out rates, and the method is covered in lowering soil pH for blueberries and azaleas.
3. Add acidic organic matter. Clemson notes blueberries are adapted to soils with 3 percent or more organic matter and recommends working 4 to 6 inches of organic matter into an 18- to 24-inch band where the row will go. Peat moss and composted pine bark both help.
4. Skip coffee grounds as a fix. UMN notes coffee grounds are not reliably acidic and would be needed in huge amounts to shift pH.
5. Retest every year or two. UMN says sulfur needs topping up over time as the bed settles. Use a home pH test between lab tests.

If your soil is well above the target or heavy clay, amending in place is a losing battle: MSU Extension does not consider it worthwhile above pH 6 or on heavy clay, and Clemson suggests choosing another site if pH is above 6.0. Grow in raised beds or large containers filled with an acidic mix of peat moss and pine bark instead.

When to plant blueberry bushes

These windows apply the sources above by zone and are approximate. Adjust the soil pH in the season before you plant. If you are planting in spring, that means applying sulfur the previous fall.

How to plant a blueberry bush: step by step

1. Pick full sun and good drainage. Blueberries fruit best in full sun and do not tolerate standing water. On heavy or wet soil, plant on a raised bed or berm.
2. Buy at least two cultivars. UMN Extension recommends planting two or more varieties: cross-pollination gives more and larger berries. Choose cultivars of the same type that bloom at the same time.
3. Space them. Set highbush and southern highbush plants about 4–5 feet apart in the row (University of Maryland Extension; Clemson) and rabbiteye about 6 feet apart; UMN spaces compact Minnesota varieties about 3 feet apart. Leave enough room between rows to walk, mow and net.
4. Dig wide and shallow. Make the hole about twice as wide as the root ball and only as deep. Mix the backfill with moistened peat moss or composted pine bark.
5. Loosen the root ball. Container-grown blueberries are often root-bound; tease or score circling roots so they grow out into the soil.
6. Plant at the same depth the bush grew in its container (Clemson). Blueberry roots are fine and shallow; Clemson notes they sit very near the surface.
7. Water thoroughly to settle the soil.
8. Mulch 2–3 inches deep with pine bark, wood chips, sawdust or pine straw, which Clemson says evens out soil moisture and temperature. Keep mulch renewed every year.
9. Remove flowers for the first one to two years (UMN and Clemson say two; NC State says at planting and for a year after) so the plant puts its energy into roots and shoots rather than a handful of berries.

Watering, fertilizing and mulch

Water. Shallow roots make blueberries quick to show drought stress, especially while fruit sizes. UMD warns that blueberries have few root hairs and may not recover if allowed to wilt. For plants on raised mounds, Clemson advises watering thoroughly two to three times a week during dry spells in summer and early fall. UMD prefers drip or soaker hoses under the mulch to sprinklers.

Fertilizer. Blueberries are easily burned by too much fertilizer. Use an acid-forming fertilizer made for azaleas and rhododendrons, or ammonium sulfate, and avoid products that raise pH. Clemson advises waiting until the first leaves reach full size before feeding newly set plants, repeating at about six-week intervals until mid-July (Piedmont) or mid-August (Coastal Plain), and stopping after July 1 on bearing plants. UMD notes blueberries prefer the ammonium form of nitrogen, such as ammonium sulfate. Product picks and rates are on best fertilizer for blueberries.

Weeds. Cultivate no deeper than about an inch near plants (Clemson) to avoid cutting roots; mulch is the better weed control.

Pruning, briefly

Light pruning starts after the first few years. Each late winter or early spring before growth starts, remove dead, damaged and low, spreading canes, then take out a few of the oldest, least productive canes at the base so younger canes replace them. UMN notes fruit is produced on one-year-old wood and suggests keeping four to six healthy older stems and one to two strong new shoots per mature bush. Unpruned bushes get crowded and bear smaller berries. The full method, by plant age, is in how to prune blueberry bushes.

When blueberry bushes produce, and how to harvest

Blueberries are a long game. UMN Extension says plants grow slowly, bear little fruit in the first 2 to 3 years, give bigger harvests after about 5 years, and reach full size in 8 to 10 years. Clemson notes blueberry plants can live 25 years or more, and UMD says well-maintained plants can live over 50 years.

UMN says fruit on one bush ripens over a couple of weeks; berries are ready when completely blue and springy when gently squeezed. Gently pull them off, and do not wash them until you are ready to eat them. Pick every few days through the season and refrigerate promptly.

Net before the fruit colors. Birds find ripening blueberries fast. Drape netting over bushes, or build a simple frame over the planting, before the first berries turn blue. Scare tape and decoys lose effect quickly.

Growing blueberries in containers

Containers are the practical answer for alkaline soil or small spaces. Choose a compact or half-high cultivar (or two, for pollination), a large pot with drainage, and an acidic, peat-and-bark-based potting mix. Water often, since pots dry fast and blueberries hate drying out, and feed lightly with an acid fertilizer. In cold zones, potted roots are far less hardy than roots in the ground; move pots into an unheated garage or sink them into the soil for winter.

Common problems

Other acid-loving shrubs that share these soil needs are covered in best plants for acidic soil.

Common mistakes

Frequently asked

What soil pH do blueberries need?

University of Minnesota Extension gives an optimum of pH 4.0 to 5.0 and says soil above 5.5 is not acidic enough; Michigan State and Maryland Extension recommend 4.5 to 5.5. Test first and lower pH with elemental sulfur the season before planting.

Do you need two blueberry bushes to get fruit?

One bush will set some fruit, but UMN Extension recommends at least two varieties because cross-pollination produces more and larger berries. Pick cultivars of the same type that bloom at the same time.

How many years does it take for a blueberry bush to produce fruit?

Expect little fruit for the first 2 to 3 years, larger harvests after about 5 years, and full size in 8 to 10 years, per UMN Extension. Removing flowers for the first one to two years helps the plant establish.

When is the best time to plant blueberry bushes?

Early spring in cold climates (zones 3–6), as soon as the soil can be worked. In the South, Clemson recommends late winter (February–March) for bare-root plants, with November–December planting working for potted plants or on sandy soils. Adjust soil pH the season before.

Where is the best place to plant a blueberry bush?

Full sun, well-drained acidic soil rich in organic matter, away from tree roots and low spots where water stands. If your soil is alkaline or heavy, use a raised bed or large containers with an acidic peat-and-bark mix.

Is it hard to grow a blueberry bush?

Not once the soil is right. The hard part is getting and keeping soil pH low; after that, blueberries need steady water, mulch, light acid fertilizer, some pruning and bird netting.

Can blueberries grow in pots?

Yes. Use a large container with drainage, an acidic potting mix based on peat moss and pine bark, and a compact or half-high cultivar. Water often and protect the pot from deep cold in winter.

Sources

1. Growing blueberries in the home garden, University of Minnesota Extension
2. Blueberry (HGIC factsheet), Clemson Cooperative Extension
3. Site Selection and Preparation for Home Blueberry Plantings, Penn State Extension
4. Growing Blueberries in a Home Garden, University of Maryland Extension
5. Acidifying Soil for Blueberries and Ornamental Plants in the Yard and Garden: West of the Cascade Mountain Range in Oregon and Washington (EC 1560), Oregon State University Extension
6. Soil test before you plant blueberries, Michigan State University Extension
7. Backyard Blueberries, NC State Extension, Richmond County
8. Vaccinium corymbosum (Highbush Blueberry), NC State Extension Plant Toolbox
9. Vaccinium angustifolium (Lowbush Blueberry), NC State Extension Plant Toolbox

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