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Apple Tree Fertilizer

Help your apple tree maintain healthy leaves, roots, and seasonal growth with our liquid Apple Tree Fertilizer. Its 3.6-3-5.1 formula supplies nitrogen, phosphate, potash, and additional minerals in an easy-to-mix form. Use it for apple trees in the ground or suitable large containers when feeding is needed, keeping your tree's age, growth, and fruiting stage in mind.

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When your apple tree may benefit from feeding

  • When your young apple tree shows weaker-than-expected spring shoot growth and nutrients are limiting
  • When your established apple tree's soil test identifies a deficiency during its growing season
  • When your container-grown apple tree resumes growth and the available nutrients in its mix are low
  • When a fruiting apple tree has been assessed for excessive versus insufficient shoot growth and a measured feeding is warranted

More fertilizer cannot correct poor pollination, spring frost damage, or incorrect pruning. Vigorous established apple trees often need little extra nitrogen, so judge growth before feeding.

Results you can see

Healthy Green Leaves healthy green leaves

Supports healthy leaf color and strong-looking apple tree foliage.

Strong Root Growth strong root growth

Supports healthy root development in young and established apple trees.

Fruit Development fruit development

Supports apple development as the tree moves through the growing season.

Works for apple tree varieties

  • Honeycrisp
  • Gala
  • Fuji
  • Granny Smith
  • Red Delicious
  • Braeburn
  • Crabapple
  • Dwarf Apple Trees
  • Apple Tree

How to use

  1. Watering can

    2 Tbs (30 mL) per gallon of water

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

  2. Hose end sprayer

    Set dial to 1 oz (30 mL) setting

    Spring & summer: every 1–2 weeks

  3. 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 fruit tree that grows canopy and sets a crop in the same season. Nitrogen at 3.6% fuels the spring flush and healthy leaves that feed the apples, and potassium at 5.1% — the highest of the three — drives fruit size, sugar, and firmness. All of the nitrogen is nitrate nitrogen, the form roots absorb directly, so response is fast and burn risk stays low in the well-draining soil apples need.

Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus calcium at 2.1% — unusually high, and the nutrient most tied to firm flesh and preventing bitter pit, the corky brown spots that develop in calcium-short apples — magnesium (0.75%), iron, manganese, zinc, boron, and copper. Boron matters especially at bloom, where a shortfall shows up as poor fruit set and misshapen apples.

How to care for apple trees

Light

Full sun, at least six to eight hours a day. Fruit set and sugar both suffer in shade, so give your tree an open spot with good air movement.

Water

Young trees need about an inch of water a week. Established trees can go longer, but water deeply during fruit sizing and dry spells rather than sprinkling often.

Soil

Well drained loam with a pH near 6.0 to 7.0. Avoid low spots that stay wet, and keep mulch a few inches back from the trunk.

Feeding

Feed through the growing season, from bud break until late summer, mixing Apple Tree Fertilizer into your normal watering. Stop in fall so new growth hardens off before frost.

Pruning

Prune in late winter while your tree is dormant. Open up the center, remove crossing or dead wood, and shorten long shoots to keep fruit within reach.

Harvest

Apples are ready when the background color shifts from green and the fruit lifts free with a gentle twist. Thin young fruit to one per cluster for better size.

Frequently asked questions

How often should I feed my apple tree?

Apple Tree Fertilizer is built for steady feeding rather than one or two heavy applications a year, because an apple tree grows its canopy and carries a crop in the same season. Mix 2 tablespoons per gallon of water and feed every 1–2 weeks through spring and summer, then every 4 weeks in fall and winter. Working it into your regular watering keeps nitrogen, potassium and calcium arriving at a pace your tree can use as leaves expand and fruit sizes. For larger trees, use the 1-ounce setting on a hose-end sprayer.

What is bitter pit and will this help prevent it?

Bitter pit is the corky brown spotting that forms in and on apples when calcium doesn’t reach the developing fruit. The cause is usually uneven water movement rather than a lack of calcium in the soil. Apple Tree Fertilizer carries calcium at 2.1%, unusually high for a liquid feed, so the nutrient is available in solution each time you water. The other half of prevention is watering evenly through the season, since your tree moves calcium into the fruit with water. Steady feeding and steady watering together give the apples the best chance of firm, clean flesh.

My tree bloomed but set few apples — why?

It depends on the cause. Boron is critical at bloom, and a shortfall shows as poor fruit set and misshapen apples; Apple Tree Fertilizer includes boron alongside its other micronutrients so nutrition isn’t the limiting factor. Pollination is the other common reason. Most apple varieties need a compatible second tree nearby and active bees during bloom to set well, and no fertilizer replaces that. Feeding removes one limit; check that a pollination partner and pollinators are covering the other, and thin any set that does come so the remaining fruit sizes properly.

Why does my apple tree fruit heavily one year and barely the next?

That pattern is biennial bearing, a natural apple habit where a huge crop exhausts your tree's reserves and it rests the following year. Apple Tree Fertilizer helps the tree carry a crop and recover from it: potassium at 5.1% supports fruit size and finish, and steady nitrogen and calcium keep the canopy and wood building through the season. The main tool against the swing, though, is thinning fruit in heavy years so the tree isn’t drained. Nutrition supports the tree; thinning evens the crop over time.

Will this burn my tree?

Apple Tree 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 trunk. Mixed at 2 tablespoons per gallon every 1–2 weeks in season, the nutrients arrive in solution at a strength the roots take up as they water, and all of the nitrogen is nitrate, the form roots absorb directly. For newly planted or bare-root apples, start at half strength for the first two feedings.

When will I see results?

Foliage answers first. New growth on a regularly fed tree comes in greener within the first few weeks, since the nitrate nitrogen in Apple Tree Fertilizer is available to roots as soon as it’s watered in. Fruit follows the season’s own calendar: the calcium and potassium in the formula support size, firmness and finish on the crop that’s developing now, so you judge that at harvest rather than in weeks. The benefit builds year over year as a consistently fed tree lays down reserves for next spring’s bloom.

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Apple Tree Fertilizer Quart $24.99