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Westland Sulphate of Iron is ideal for Ericaceous and acid-loving plants, plus has immediately available Iron for best plant growth.

  • Ready to use granules
  • Strong root growth
  • Richer, green foliage
  • Acidifies the root zone
  • Prevents leaf yellowing
  • Contains iron

Sizes available

  • 1.5kg
  • Product Details
  • How to Use
  • TIps & Advice
  • Useful Information

Why Use

Sulphate of iron makes soil more acidic, enabling special acid-loving plants to take up the nutrients they need for healthy growth and development.

For these special plants, if soils become too alkaline they suffer severe deficiencies when essential nutrients such as iron become unavailable. Sulphate of iron enriches and unlocks these nutrients from the soil. Works best for rhododendrons, camellias, azaleas and hydrangeas.

What to Expect

Sulphate of Iron will create the right conditions for healthy plant growth, keeping leaves green and healthy and preventing leaf yellowing.

For best results: When planting out your trees and shrubs use a dedicated compost to give your plants the very best start.

When to Use

Sulphate of Iron can be applied every 4-6 weeks during the growing season from March to the end of August. Granules should be worked into the soil. During dry weather, water thoroughly before and after application.

How to Use

One handful of Sulphate of Iron is approximately 35g (1¼ oz).

You can apply Sulphate of Iron every 4-6 weeks to maintain the best soil pH for ericaceous plants.


Trees and shrubs

Apply 35g/sq. m (1¼ oz/sq. yd) around the base of established plants. Gently fork into the soil surface without disturbing the plant roots. Or alternatively, sprinkle the product over the soil surface, around the stem of the plant and water thoroughly. When planting out apply 35g/sq. m (1¼ oz/sq. yd) to the bottom of the planting hole and mix well with the soil or compost when refilling the hole.


Apply 35g/sq. m (1¼ oz/sq. yd) on the soil surface and fork in. Take care that the granules do not touch the plant leaves or
stems. Water in well after application.

General Advice

  • It is good practice to wear gloves and eye protection when using the product
  • Do not exceed application rates when applying product overdosing can cause damage to plants
  • To be used only where there is a recognised need


Frequently Asked Questions

Q. Can my children & pets go into the treated area?

A. Yes children and pets can go back into the area straight after application

Q. Could I use this to feed all my (non-ericaceous) plants?

A. We would recommend using a fertiliser more suitable for all purposes, such as Growmore or Gro-sure All Purpose Plant Food.

Q. What should I do if I put on too much of the product?

A. Remove any visible granules and heavily water the area to dissolve and wash through excess product.

Q. Can I use this on my lawn to remove moss?

A. No, we cannot advise any application or dilution rates for this product for use on lawns. To remove moss on lawns use specific lawn treatment for moss, for example Lawn Sand.

For any questions or advice, please contact our technical advice line on 01480 443789 (Mon-Fri 10am-4pm) or email [email protected]

Safety Information

WARNING: Causes serious eye irritation. Harmful if swallowed. Causes skin irritation

Contains >97% w/w iron (II) Sulphate Heptahydrate.

  • Keep out of reach of children
  • Wear protective gloves/ protective clothing and eye protection

If in Eyes:

  • Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

If Swallowed:

  • Call a Poison Centre or doctor/physician if you feel unwell.


  • Dispose of contents/container to a licensed hazardous waste disposal contractor or collection site. Contact your local council for details.

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