Blueberry Fertilizer for Healthy Bushes & Fruit

When your blueberry bushes may benefit from feeding

When your blueberry bush starts producing fresh spring shoots and its soil has a demonstrated nutrient need
When your container blueberries are actively growing and the potting mix has limited available nutrients
When a soil test shows low nutrients while confirming the pH is appropriate for your blueberry roots
When your established bushes are supporting leaf and berry development and a nutrient shortfall is identified

Blueberry fertilizer is not a replacement for adjusting soil pH. If your leaves yellow despite feeding, test pH before increasing fertilizer, and avoid excessive feeding late in the season.

Results you can see

Supports healthy fruit development for more plentiful, better-looking blueberries.

Supports fresh shoot and leaf development for a fuller, thriving blueberry plant.

Supports healthy root systems for better water and nutrient uptake.

Works for blueberry varieties

Bluecrop Blueberry
Duke Blueberry
Patriot Blueberry
Sunshine Blue Blueberry
Blueberry

How to use

Watering can

2 Tbs (30 mL) per gallon of water

Spring & summer: every 1–2 weeks · Fall & winter: every 4 weeks
Hose end sprayer

Set dial to 1 oz (30 mL) setting

Spring & summer: every 1–2 weeks
Leaf misting (optional)

1 tsp per quart (32 oz) of water

Every 1–2 weeks

What's inside

The 3.6-3-5.1 ratio is built for a fruiting shrub that grows and crops in the same season. Nitrogen at 3.6% fuels your canes and foliage that feed the berries, and potassium at 5.1% — the highest of the three — drives fruit size, sugar, and firmness. All of the nitrogen is nitrate nitrogen, which blueberries take up efficiently in their preferred acidic soil, with fast response and low burn risk on shallow, fibrous blueberry roots.

Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus calcium at 2.1% — unusually high, and what builds strong canes and firm fruit — magnesium (0.75%), iron, manganese, zinc, boron, and copper. Iron and magnesium matter most for blueberries: in soil that isn't acidic enough, both lock up and leaves yellow between the veins, so keeping soil pH in the 4.5–5.5 range lets this nutrition actually reach your blueberry bush.

How to care for blueberries

Light

Full sun, six to eight hours a day, gives the heaviest crops. Plants tolerate light afternoon shade in hot climates, but deep shade means very few berries.

Water

Blueberries root shallowly and dry out fast. Give them an inch or two of water a week and keep a thick mulch over the roots to hold moisture.

Soil

Acid soil is the whole game: pH 4.5 to 5.5, loose and rich in organic matter. Work peat moss or pine bark into the planting hole.

Pruning

Prune in late winter while the bushes are dormant. Take out old, twiggy canes and thin the center so light reaches the young fruiting wood.

Feeding

Feed Blueberry Fertilizer every one to two weeks through spring and summer, easing to about once a month in fall and winter, mixed into your watering can.

Harvest

Berries are ready a few days after they turn fully blue, when they drop into your hand with a light roll of the thumb.

Frequently asked questions

How often should I feed my blueberries?

Blueberry Fertilizer is designed for light, steady feeding, which suits a shrub with shallow, fibrous roots far better than occasional heavy doses. Mix 2 tablespoons per gallon of water and apply every 1–2 weeks in spring and summer, through growth and fruiting, then every 4 weeks in fall and winter. A hose-end sprayer on the 1-ounce setting covers a row of bushes quickly, and you can mist the leaves with 1 teaspoon per quart every 1–2 weeks if you like. Fold it into your normal watering and the nutrition stays consistent all season.

My blueberry leaves are yellowing between the veins — will this fix it?

If the cause is nutrition, yes. Yellowing between the veins on blueberries usually means iron or magnesium isn’t reaching your blueberry bush, and Blueberry Fertilizer carries both. The underlying cause is often soil pH, though: above about 5.5, those minerals lock up in the soil no matter how much you feed. Test your soil, keep it in the 4.5–5.5 range blueberries prefer, and the iron and magnesium in the formula can reach the roots, with new growth coming in greener over the following weeks.

Does this make my soil acidic?

No. Blueberry Fertilizer is a fertilizer, not a soil acidifier. It’s formulated for the acidic beds and containers blueberries need, with nitrate nitrogen your blueberry bush takes up efficiently at that pH, but it doesn’t lower pH itself. Blueberries need soil around pH 4.5–5.5 to take up nutrients, so test your soil and use elemental sulfur or a soil acidifier to bring it into range if needed. Our formula supplies the nutrition; the pH work is separate and just as important for your plant.

Will this burn my plants?

Blueberry Fertilizer is a dilute liquid feed, and dilution is what matters here. Fertilizer burn happens when concentrated salts sit against the roots: too much product in too little water, or granules piled at the base of a plant, which matters for a shrub with shallow roots. Mixed at 2 tablespoons per gallon and applied every 1–2 weeks in the growing season, the nutrients arrive in solution at a strength the roots take up as they water. For newly planted bushes still establishing, start at half strength for the first two feedings.

Can I use it on potted blueberries?

Yes, at the same 2 tablespoons per gallon. Blueberry Fertilizer is made for the acidic beds, raised rows and containers blueberries grow in, and container plants often benefit most, because potting mix loses nutrients faster than garden soil as water runs through it. Regular feeding replaces what each watering carries away. Make sure the mix is an acidic one formulated for blueberries or other ericaceous plants, since the iron and magnesium in the formula can only reach the roots when the pH is in range.

When will I see results?

New growth comes first. With soil pH in range and regular feeding, the emerging leaves on your blueberries typically come in greener within the first few weeks, since the nitrate nitrogen and iron in Blueberry Fertilizer are available to the roots as soon as they’re watered in. Berry improvements follow the season’s crop, with potassium and calcium in the formula supporting fruit size and firmness, and consistently fed bushes build stronger canes that carry heavier harvests over the following years.

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