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  • Silver packaging of GrowScripts Berry Bush Care Kit with colorful label on a white background
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Berry Bush Fertilizer Kit: Large & In-Ground Blueberry, Raspberry, Blackberry Kit

$44.99
$40.99
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You grow berries for the harvest, bowls of blueberries and handfuls of raspberries off your own bushes, not for weak canes and a thin picking.

But once berry bushes go into a raised bed, a big container, or the ground, they feed from a larger root zone and set a heavier crop, and a small kit runs out fast. Underfed berries show it plainly: pale or reddening leaves, weak new canes, and small, sparse fruit.

What berry growers want is simple. Feed the planting enough, at the right time, and keep the canes strong and the fruit coming.

That is what this kit does. It carries enough season-long feeding, micronutrient support, and calcium for a large berry bush or a young to mid-size in-ground planting, with extra iron for acid-loving berries like blueberries, applied as one simple routine instead of four.

Key features

Sized for large bushes, raised beds, and young to smaller in-ground plantings. One kit feeds a 30-gallon planting, two 15-gallon plantings, or three 10-gallon plantings for a full season.
Controlled-release NPK 18-6-12, 2-month release. Reapplied every two months for steady feeding through the growing season.
Extra iron for acid-loving berries. Supports blueberries and others prone to iron chlorosis.
Micronutrient foliar or soil spray. Corrects the deficiencies that yellow berry leaves, with iron, manganese, zinc, copper, and molybdenum.
Calcium, magnesium, and boron support. Improves fruit set and quality.

Ingredients

Everything in the kit, with a season application calendar:

  • Controlled-release NPK 18-6-12, 2-month release. 3 cups, net wt 24.6 oz (697.4 g), covers up to 15 sq ft. A nitrogen-forward feed with added iron for acid-loving berries.
  • Essential trace elements spray. 1 oz, net wt 1.2 oz (34 g), covers up to 312 sq ft. Iron, manganese, zinc, copper, and molybdenum.
  • Calcium, magnesium, and boron nutrient spray. 1 oz, net wt 1.2 oz (34 g), covers up to 312 sq ft. Supports fruit set and quality.

How to use

Three products, one simple rhythm. The kit includes a size chart and a calendar.

  1. NPK 18-6-12 granule, feeds the roots. Spread the pre-measured pouch evenly over the soil around the plants, not touching the canes or crowns, at the amount for your planting or container size on the included chart. Reapply every two months through the growing season, for example March, May, and July, and every two months year-round for indoor plants. Heavier applications are fine. Do not mix the granule with water.
  2. Essential trace elements, for plant health. Apply as a foliar spray or as a soil drench. Foliar: mix one pack with 64 oz of water and spray the leaves until run-off, every four to six weeks during active growth, more often if leaves yellow. Soil: mix one pack with 128 oz of water and drench the root zone, any time to correct yellowing.
  3. Calcium, magnesium, and boron spray, for fruit. Apply as a foliar spray or as a soil drench, every four to six weeks, before and at bloom and as fruit sets, in rotation with the trace spray. Foliar: mix one pack with 64 oz of water. Soil: mix one pack with 128 oz of water during fruit development.

Getting started: at first, apply the sprays every 5 to 7 days until the first packet is used, then settle into every four to six weeks, and reapply the granule every two months.

Why?

Berry bushes in a raised bed or in the ground grow larger and fruit heavier than potted plants, and without steady nutrition they show weak canes, pale or reddening leaves, and small fruit. This kit gives a large or in-ground berry planting complete season-long feeding plus the extra iron acid-loving berries need, so you get stronger canes, better fruit set, and a heavier pick.

Makes how much?

One kit feeds a single 30-gallon planting, two 15-gallon plantings, or three 10-gallon plantings, and so on by total soil volume, or a young to mid-size in-ground berry planting, for a full growing season. Feeding container or patio berries in small pots? The container Berry Kit is sized for that. Feeding a large established berry patch or long in-ground rows? Plan on more than one kit to cover the full area.
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Silver packaging of GrowScripts Berry Bush Care Kit with colorful label on a white background

Berry Bush Fertilizer Kit: Large & In-Ground Blueberry, Raspberry, Blackberry Kit

$44.99
$40.99

Frequently Asked Questions

How much will one kit feed?

It scales by total soil volume: a single 30-gallon planting, two 15-gallon plantings, or three 10-gallon plantings, and so on, or a young to mid-size in-ground berry planting, for a full season. Follow the per-plant rate on the label.

What is this sized for?

Large berry bushes, raised beds, and young to mid-size in-ground plantings. For container and patio berries in small pots, the container Berry Kit is the better fit. For a large established patch or long rows, plan on more than one kit.

Do blueberries need anything special?

Yes. Blueberries need acidic soil, roughly pH 4.5 to 5.5, to take up nutrients, which is more acidic than most plants. This kit carries extra iron and complete nutrition to support them, but it does not replace acidic soil. Test your bed's pH and amend it with a soil acidifier such as elemental sulfur if it is too high, and the feeding will work far better.

Which berries does it work on?

Blueberries, raspberries, and blackberries grown in large containers, raised beds, or in the ground. Strawberries have their own dedicated Strawberry Kit built for how they grow and fruit.

Why are my berry leaves yellowing?

Usually low nitrogen or iron. On blueberries, yellowing between green veins most often means the soil is not acidic enough for the roots to take up iron, so check pH along with feeding.

How is this different from the small kit?

Same feeding approach, scaled up. The small kit is sized for container and patio berries, while this kit covers large bushes, raised beds, and young to mid-size in-ground plantings. If you are growing berries in small pots, choose the container Berry Kit instead.

All about feeding large and in-ground berries

Feeding berries in beds and in the ground

In-ground and raised-bed berries spread their roots through a wider area than potted plants, so fertilizer works best broadcast evenly over the root zone around the plants rather than dropped in one spot. Brambles like raspberries and blackberries send up canes across a patch, and blueberries build a spreading root system near the surface, so even coverage matters. As a planting fills in and fruits more heavily, its nutritional demand grows, which is why this kit is sized for young to mid-size plantings and a large established patch needs more.

Blueberries and soil acidity in the ground

Blueberries need acidic soil, around pH 4.5 to 5.5, and this matters even more in the ground than in a pot, because you are working with your native soil rather than a bag of mix. In soil that is too alkaline, blueberries develop yellowing leaves with green veins no matter how well you feed them, because the roots cannot take up iron. This kit carries extra iron and full nutrition, but the lasting fix is soil acidity, so test the bed before planting and amend with elemental sulfur to bring the pH down, then feed on top of that foundation.

Why bigger berry plantings need more

A berry planting's demand scales with its size and how heavily it fruits, so an established patch needs far more than a young bush or a couple of canes. Underfed berries tell you through weak new canes, pale or reddening leaves, and small or sparse fruit. Feeding to match the size of the planting keeps the canes vigorous and the fruit sizing up.

Pro tips for feeding a larger berry planting

Broadcast the granule evenly over the root zone, keeping it off the canes and crowns.

For blueberries, get the soil pH right first, since feeding cannot overcome soil that is too alkaline.

Water consistently, as berries have shallow roots that suffer in both drought and waterlogging.

Feed through the active growing season and lean on the trace spray whenever leaves pale.

How this kit simplifies a larger planting

Instead of buying and measuring separate products for a bed or a row, this kit combines steady controlled-release feeding, a micronutrient spray, and calcium support into one pre-measured routine you can keep. That consistency is what keeps a berry planting productive across the season.

Container or in-ground: which kit do you need?

If you are growing berry bushes in small pots, the container Berry Kit is sized for that. This kit steps up to large bushes, raised beds, and young to mid-size in-ground plantings. For a large established patch or long rows, plan on more than one kit.

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