Your online orders cannot currently be placed through your PGW Customer Account Web login. Please contact our online support team for more information.

BioGro Natural Gypsum 25 kg

Gypsum Natural is a horticultural calcium and sulphur fertiliser used to improve soil structure and water retention of heavy clay soils by loosening the clay, allowing for better drainage. As a fertiliser, gypsum is fast-acting and pH neutral while most other calcium fertilisers either raise or lower soil pH.

Read more
availability map This product is only sold and available in the North Island
In stock

Dispatch Options

Delivery Available
Click and Collect In Store Available


In Selected Stores and Online
Online Only

Shipping Rates

Online orders can be delivered straight to your farm, orchard, lifestyle block or residential house across New Zealand. Note that at this stage, we do not offer international deliveries or deliveries to the Chatham Islands, Great Barrier Island, Stewart Island or Waiheke Island.

All orders that can fit into one standard courier parcel that is 25kg or less and 0.125mᶟ. $9.00
All orders that can fit into two to three standard courier parcels that equal less than 50kg in total. $15.00
All orders that are 50 to 100kg and cannot fit into less than three standard courier parcels. $50.00
All orders that are more than 100kg in total and cannot fit into less than three standard courier parcels. $100.00

Exclusions apply. Read the full delivery policy here.

Easy Returns

Products ordered online can be returned within 30 working days of taking delivery of the products, provided they meet our return conditions. The goods can be either refunded, replaced or exchanged.

There are three effortless ways to process a return:

  • Processing a return online: Sign into your PGG Wrightson Web Account and look for "Returns" on your left menu and follow the steps.
  • Returning a product in store: Head into your local PGG Wrightson store with your packaged product and your online order reference (in print or electronic version).
  • Contacting our customer service team: Ring 0800 10 22 76 and our customer service team will take you through the steps to return the product to us.

All our return conditions are set in the PGW Terms of Sale / Trade. Exclusions apply. 

Friendly Support

Our friendly customer service team is always ready to help you. We have multiple communication channels to ensure a quality responsive service.

You can contact our customer service team at any time through the following channels:

Support Hours, Monday - Friday: 8 AM to 5 PM

Secure Payment

All credit and debit card transactions are fully managed through a dedicated payment gateway hosted by Windcave. At the time of a purchase, your card details are sent directly to Windcave, who offer full end-to-end encryption. This technology is designed by Windcave to prevent any unauthorised viewing and downloading of your payment information. At no point does PGG Wrightson has access to, or store any of your credit or debit card information.

For further information on payment and security on the PGG Wrightson online store, please see our Terms of Sale, Privacy Policy or FAQs.

SKU#: 128454

  • BioGro certified #3860
  • Gypsum is calcium sulphate di-hydrate (CaSO4 2H2O)
  • The bulk density of this gypsum product is 908 kg per m3 (loose) and 1,172 kg per m3 (compacted)
  • Gypsum mixes well with other dry fertilisers and can be used to assist in the uniform application of small quantities of zinc, manganese, boron and the other trace elements
  • Winstone Gypsum produces two gypsum products that are chemically identical: Soil Life®, a fine ground form, and Gypsum Natural, a coarser pulverised form
  • Gypsum has high purity with 93 to 98% calcium sulphate. Contains other minerals: sulphur 18% and calcium 23.26%

Knowledge Hub