--- product_id: 49283296 title: "British Gypsum for Agricultural Amendment, Amend Very Compact Clay Soils, 25 kg Bag" brand: "british gypsum" price: "ΰΈΏ33981" currency: THB in_stock: true reviews_count: 8 category: "British Gypsum" url: https://www.desertcart.co.th/products/49283296-british-gypsum-for-agricultural-amendment-amend-very-compact-clay-soils store_origin: TH region: Thailand --- # Fast natural breakdown Rapid soil absorption 25 kg heavy-duty bag British Gypsum for Agricultural Amendment, Amend Very Compact Clay Soils, 25 kg Bag **Brand:** british gypsum **Price:** ΰΈΏ33981 **Availability:** βœ… In Stock ## Summary > 🌿 Unlock your soil’s potential β€” don’t let heavy clay hold you back! ## Quick Answers - **What is this?** British Gypsum for Agricultural Amendment, Amend Very Compact Clay Soils, 25 kg Bag by british gypsum - **How much does it cost?** ΰΈΏ33981 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/49283296-british-gypsum-for-agricultural-amendment-amend-very-compact-clay-soils) ## Best For - british gypsum enthusiasts ## Why This Product - Trusted british gypsum brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Dual Nutrient Boost:** Supplies essential calcium and sulfur to enrich your soil naturally. - β€’ **Quick-Acting Formula:** Water-soluble gypsum absorbs rapidly to start improving soil structure fast. - β€’ **Trusted by Gardeners:** Highly rated with 4.5 stars and proven results against soggy, boggy soil. - β€’ **Versatile Application:** Perfect for farmland, sports fields, and home gardens alike. - β€’ **Transform Heavy Clay Soils:** Breaks down compacted soil for easier cultivation and healthier roots. ## Overview British Gypsum Agricultural Amendment is a 25 kg powder designed to improve heavy clay soils by breaking down compaction quickly and naturally. It delivers essential calcium and sulfur nutrients, absorbs rapidly into soil, and is ideal for farmland, sports fields, and gardens. Trusted by thousands with a 4.5-star rating, it helps prevent waterlogging and promotes healthier plant growth. ## Description Product description Ground gypsum for soil treatment, main applications include: To improve the structure of heavy clay soils on farmland,sports fields and gardens. As a carrier in horticultural dressings and garden products As a source of sulphur and calcium, Directions Apply liberally to cover plants, grass, and soil. Water soluble, absorbs quickly into the soil. Safety Warning May cause irritation to skin and eyes. Avoid contact with skin and eyes. Do not ingest or inhale. Use protective clothing, gloves, and eye/face protection during application. Keep out of reach of children and pets. In case of accidental exposure, rinse thoroughly with water. Store in a cool, dry place away from heat sources and incompatible materials. Review: Works may need to wait to see plant benefits - Used on my lawn , where water was pooling has been week and already seen an improvement in drainage and the grass has gone a nice healthier green Wear a mask when using and put down when you know you will have rain soon Don't mix with water , it makes a mess and will just leave lumps on your grass or soil Review: Thanks! - Good price & speedy delivery ## Features - Will break down heavy unworkable soils - Easy to apply - Breaks down quickly and naturally. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00CORDKW2 | | Best Sellers Rank | 13,685 in Garden ( See Top 100 in Garden ) 259 in Gardening Soils | | Brand | British Gypsum | | Brand Name | British Gypsum | | Coverage | Plants, grass, and soil | | Customer Reviews | 4.5 out of 5 stars 571 Reviews | | Global Trade Identification Number | 05027588009480 | | Item Form | Powder | | Item Weight | 25 Kilograms | | Item form | Powder | | Item weight | 25 Kilograms | | Manufacturer | British Gypsum | | Mixing Ratio | 1:0:0 | | Model Number | ves769 | | Number of Packs | 1 | | Part Number | ves769 | | Specific Uses For Product | Soil Treatment | | Specific uses for product | Soil Treatment | | Target Species | plants, grass | | Unit Count | 25000.0 gram | ## Product Details - **Brand:** British Gypsum - **Global Trade Identification Number:** 05027588009480 - **Item form:** Powder - **Item weight:** 25 Kilograms - **Specific uses for product:** Soil Treatment ## Images ![British Gypsum for Agricultural Amendment, Amend Very Compact Clay Soils, 25 kg Bag - Image 1](https://m.media-amazon.com/images/I/61G9o71IS-L.jpg) ## Questions & Answers **Q: How do you apply it? Do you just put it on top of the soil? Do you water it afterwards?** A: Oooh, you really don't want me to answer that, because I am something of a nutcase on the subject. A year ago I moved into a place with terrible heavy clay soil over builder's rubble, with a seam of clay under that, and wanted to dig the beds once, then never again. So I have dug out every scrap of soil, 3 feet down and riddled (sieved) it all to get out the rubble and break it up, mixed the gypsum into each bucket-load of soil and put it all in a dumpy bag. Then broke up the clay seam at the bottom of the trench with a mattock and poured in a good thick drainage layer of the smaller rubble, more gypsum in the form of wetted offcuts of new plasterboard and a load of conifer trimmings (will break down slowly, add some organic material and in theory some acidity, also gets rid of the conifer trimmings). I then then backfilled with the treated soil and at least an equal quantity of well-rotted manure. I am now in my second season and the beds are a dream - light, well-drained, ridiculously fertile, and packed with worms - more than I have ever seen in any soil. I have just added a mulch of more manure and loosely turned it in, but that is it. I have set up supports so that I can lay a plank across and not put any weight on the surface of the beds. So - you may not have wanted to hear all that - but I did read somewhere that gypsum will eventually wash out of a soil, so my approach was the use it to initially condition a clay soil (fertile, but otherwise a total nightmare), then maintain the condition with lots and lots of organic material (effectively stopping the clay from clumping together again) and let the worms do the rest. And I am an old bird - a retired nurse with messed up wrists and shoulders, so not some big strapping chap - but I would do it all again to know that this is it forever, and there isn't anything I can't grow, as it also means that I can control the pH in different beds for different plants and crops. Sorry - as I said, you really didn't want me to answer that! **Q: can you please let me know HOW to put the gypsum?? do i dig the soil & turn it over (this is difficult). or just on top of soil.** A: Gypsum penetrates more easily than lime so deep working was not recommended. I forked the ground down to about 6 inches and broke the bigger clods to 2-3 inches. The gypsum was fine free flowing and easy to apply evenly, at 5oz/sqyd. Compared to lime it went into the finest cracks without caking. **Q: My home was built recently and the garden is about 8" of topsoil over clay, when it rains the lawn is sodden. What's the best method of application?** A: I removed the topsoil, into large bags, sprinkled a good layer of gypsum onto the clay (impossible to dig it in) and then replaced the topsoil, also mixed with gypsum. It worked well...no puddles! **Q: Is this product plain Gypsum or are there more substances added? Do you have some experience with mushroom cultivation with this product?** A: is this 100% pure or does it have anything added to it? (I want it for mushroom cultivation) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works may need to wait to see plant benefits *by L***U on 16 May 2026* Used on my lawn , where water was pooling has been week and already seen an improvement in drainage and the grass has gone a nice healthier green Wear a mask when using and put down when you know you will have rain soon Don't mix with water , it makes a mess and will just leave lumps on your grass or soil ### ⭐⭐⭐⭐⭐ Thanks! *by J***E on 13 May 2026* Good price & speedy delivery ### ⭐⭐⭐⭐ agricultural british gypsum *by K***T on 28 April 2016* Our garden was quite boggy, you couldn't walk on it for sinking and sliding about, I added loads of rotted manure and 3 tons of sharp sand, left it for about a yr now I'm trying the gypsum. I put the gypsum on our clay soil a few days ago, I think its working, im quite impatient in getting the garden sorted but it all takes time! In some parts its still quite sticky and heavy so will need to buy some more gypsum. We don't sink or slide about and in some parts its quite crumbly so yeh getting there! Its good that it doesn't alter the ph of the soil when you just need something to break the clay up and aid drainage plus it adds some nutrients for plant roots too when eventually we get to be able to plant some plants! 😊 ## Frequently Bought Together - British Gypsum for Agricultural Amendment, Amend Very Compact Clay Soils, 25 kg Bag - Zinc Products Vitax Clay Breaker 10kg Tub | Breaks Up The Heaviest Clay Making Soil Easier To Work - 6X Natural Fibrous Fertiliser 1 x 15kg bag --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/49283296-british-gypsum-for-agricultural-amendment-amend-very-compact-clay-soils](https://www.desertcart.co.th/products/49283296-british-gypsum-for-agricultural-amendment-amend-very-compact-clay-soils) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-06-08*