How to grow blueberries: a commercial guide

Match the type to your winter

Highbush and half-high

Highbush blueberries are the standard commercial type for cool-temperate climates. Half-high types are crosses of highbush and lowbush blueberries that stay short and are hardy enough for winter minimums of roughly −40 to −23°C (USDA zones 3–5), where taller types suffer winter injury.^1,2

Check local trial data

Cold hardiness, chilling need, fruit size and ripening date differ widely by cultivar, so choose from variety trials near you rather than from a US catalogue. Alternating different cultivars also helps pollination.²

Fix soil pH a year ahead

Target

Penn State gives pH 4.5–5.0 and Penn State advises against blueberries when native pH is above 6.2. Minnesota calls 4.5–5.5 optimum, with iron chlorosis likely above 5.8.^1,2

Sulfur timing

Elemental sulfur reacts slowly, so apply and incorporate it to plough depth the year before planting, then retest after three to four months. Iron sulfate acts faster but costs more; avoid aluminium sulfate, which can be toxic to roots.²

Organic matter

Blueberries produce best in soils with high organic matter, and cover crops ploughed under help. Acid sphagnum peat at 28–57 litres (1–2 cubic feet) per plant can rescue high-pH soil but wears off over six to ten years.^1,2

Weeds

Clear perennial weeds the year before planting; they are very hard to control afterwards.^1,2

Plant dormant stock in spring

Spacing

Plants go 1.2–1.5 m (4–5 ft) apart in rows 2.4–3 m (8–10 ft) apart, set by your equipment. Minnesota counts about 3,360 plants per hectare (1,360 per acre) at 1.2 by 2.4 m; Penn State gives about 1,790–2,690 per hectare (726–1,089 per acre) at 1.5 m in rows 2.4–3.7 m.^1,2

Date

Plant dormant stock in early spring, as soon as the field allows (about April at Penn State; the southern-hemisphere equivalent is roughly September–October). Spring beats autumn in cold climates for spring rains and less frost heave. Potted plants that have leafed out wait until frost has passed.^1,2

Planting

Holes are about 30 cm (one foot) deep and wide. Loosen the roots of container plants, and set the plant at the depth it had in the container.²

Mulch

Mulch 7.5–10 cm (3–4 inches) deep (Penn State: 10 cm or more) with rotted sawdust, peat, bark, pine needles or composted organic matter, and keep it a few centimetres off the stem. Fresh sawdust takes more nitrogen.^1,2

Feed lightly with an acid-forming nitrogen

Rates

On mineral soils the Minnesota guide applies 34, 45 and 56 kg N per hectare (30, 40 and 50 lb per acre) in years one to three, 11–22 kg less on high-organic soils, then follows leaf analysis.²

Source and timing

Use ammonium sulfate or urea to help hold soil pH down. Excess late-season nitrogen can increase winter injury, so stop in midsummer (Minnesota avoids applications after 1 July).²

Water

Roots are shallow, mostly in the top 15 cm (6 inches). Do not let soil dry below 30–50 kPa (centibars) of tension between irrigations, and give a uniform supply from blossom through harvest.²

Remove flowers and prune

Early flowers

The Minnesota commercial guide removes flowers for the first two years so plants can establish before carrying a crop.²

Pruning

Prune each year while dormant, late in the dormant season (March in Pennsylvania), before buds swell. Remove dead wood, weak growth and old canes; after year three keep about 6 to 7 vigorous older stems and one or two strong new shoots.^1,2

Time to crop

Penn State expects a small crop of about 2,000 pints per acre in year three (roughly 1.5 t/ha), rising until about year five, with 6,000 pints per acre (roughly 4.5 t/ha) possible. Half-high cultivars in cold climates need about five years for a large crop and up to ten to reach mature size.^1,2

Pollination, birds and fruit fly

Bees

Bees pollinate blueberries. Many cultivars set without a second variety but mixed plantings give larger berries and earlier ripening; alternate every 4 rows or every 4–5 plants. The Minnesota guide uses about one honeybee hive per acre (roughly 2.5 per hectare) on large plantings; bumblebees are better but dearer.²

Birds

Netting is the only measure that gives complete protection year after year (Penn State). Distress-call and visual scare devices are only partial measures.^1,2

Spotted wing drosophila

This fruit fly is a pest wherever it has spread. Penn State advises early-fruiting cultivars, which avoid much of the damage.¹

Yield benchmark and your own margin

The only consistent national dataset used here is the United States, so treat these as a benchmark and not a forecast for your country. Cultivated blueberries were harvested from about 42,400 hectares (104,700 acres) in 2025, with about 345,000 tonnes (761 million pounds) utilised: roughly 189,000 tonnes fresh and 156,000 tonnes processed.

Read the chart carefully

The Pacific states pull the US average of 8.2 t/ha up; the other five states average roughly 4–6.5 t/ha. Yield and price vary several-fold between regions, soils and markets, so the national average says little about your field.³

Test your own location

Run a field audit for your coordinates to compare your climate, soil pH and water with what blueberries need, then put your own costs and prices into the crop ROI estimator. Both buttons are below.^1,2

Frequently asked questions

What pH do blueberries need?

Penn State gives 4.5–5.0; Minnesota calls 4.5–5.5 optimum. Penn State advises against planting blueberries where native pH is above 6.2.

How far apart do you plant blueberries?

Plants 1.2–1.5 metres (4–5 feet) apart in rows 2.4–3 metres (8–10 feet) apart. Penn State uses 1.5 metres in rows 2.4–3.7 metres, about 1,790–2,690 plants per hectare.

When do you plant blueberries?

Dormant plants go in early spring as soon as the soil is workable, about April in Pennsylvania. Potted plants that have leafed out wait until after frost.

How long until blueberries produce?

A small crop arrives in year three and production rises until about year five. Cold-climate guides remove flowers for the first two years.

How do you lower soil pH for blueberries?

Apply and incorporate elemental sulfur the year before planting; the University of Minnesota gives about 560–2,800 kg per hectare on loam depending on starting pH. Use ammonium sulfate or urea as the nitrogen source.

Do blueberries need a second variety?

Many cultivars set without one, but mixed plantings give larger berries and earlier ripening. The Minnesota guide uses about one honeybee hive per acre (roughly 2.5 per hectare) on large plantings.

What yield can I expect from blueberries?

Penn State expects a small crop of roughly 1.5 t/ha in year three, rising to about 4.5 t/ha or more by year five. The US average in 2025 was 8.2 t/ha, with the best regions above 12 t/ha. Audit your own location before budgeting.