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TABCOTE alum pouch in a garden setting

TABCOTE® / Plant nutrition

Aluminum Sulfate

Blue hydrangeas aren't a variety, they're a soil condition. This tablet supplies aluminum and lowers pH a little at a time, so blooms turn blue and stay blue without shocking the plant.

  • Aluminum sulfatecoated tablet
  • 4 monthsone application
  • 5 / plantpotted hydrangea
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20 × 5 g pouch · not a fertilizer

The formula

Nutrition for
your plant.

Gradually supplies aluminum and acidifies the root zone to support blue hydrangea blooms.

  • Available aluminumProvides the aluminum needed for blue flower pigment.
  • Lower soil pHAcidifies the root zone so aluminum remains available.
  • Four-month releaseCoating meters the supply instead of delivering a single concentrated dose.
  • Use alongside plant foodContains no nitrogen, phosphorus or potassium. Pair with TABCOTE® Hydrangeas.
  • Best suited to containersPotting mix is easier to acidify. For alkaline landscape soil, test the soil and follow the bag instructions.
Guaranteed analysis & formulation notes

Guaranteed analysis

Derived fromAluminum sulfate

Coating certified biodegradable (EN 17033). Does not affect white or panicle hydrangeas, whose color is not pH-dependent.

The right amount

A clear dose.
For every planting.

Five tablets per potted hydrangea, spaced around the pot. One pouch treats four plants.

Your plantingRecommended dose
Potted hydrangeaAny container, at planting or now5 tablets
Keep it blueRe-apply every 4 months5 tablets
Newly planted in a bedAcidic or neutral soil5 tablets
Landscape bush on alkaline soilLarge, establishedUse the bag and test soil

Calculate your quantity

at 5 tablets per plant

Getting started

How to apply.

Three simple steps.
One application.

  1. Step 1

    Select your tablets

    Use the recommended tablet count for your plant or pot size.

  2. Step 2

    Place in the soil

    Place 2 inches deep and 2 inches from the stem. Space tablets around the plant.

  3. Step 3

    Cover and water

    Cover the tablets completely with soil, then water the plant.

Your next step

Find TABCOTE near you.

Available through independent garden centres.

Find a stockist

Growing something else?

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Keep away from children and pets. Follow the instructions on your product pouch.