Elixir Gardens Gypsum | Calcium Sulphate Clay Breaker Agricultural Grade Natural Soil Improver | Homogenous Granule Wind Resistant | Various Sizes 250g-25kg | (1kg) | Treats 5sqm

Great item slowly but surely eats away the clumpy clay under my lawn, it's drained loads better. I drilled holes 2 foot deep put a 1kg in each hole. Mostly filled the hole with water and left it to drain for a few days. I then packed it with compost as that burns at clay too. Topped the compost up a few times until it was firm. Last few inches I put topsoil in. Worked great after a few month. It takes time. I will do 6 monthly sprinkling sparingly to keep at that clay. It did great at the bottom of planters but just a tiny bit. Just don't use on acidic soil loving plants, check guidelines on plants

Hard to tell if this will actually help a clay garden with poor drainage or not. It will take many months or even years of applying gypsum to have a significant effect. But i can say this is granular so easy to spread and has had no negative effects on the lawn. It doesn’t mark paving slabs either.

Arrived very quickly, had been recommended to buy this product to use on very heavy soil. Absolutely great results.

This helped break up the stubborn clay in my garden that could’ve doubled as pottery clay. After a few weeks of use, the soil started behaving like soil again – crumbly, airy, and actually drainable. Easy to apply and wind-resistant granules mean less wastage. If this helped improve your soil and your mood, go ahead and hit “Helpful”.

Would be better buying the liquid version

Worked well on my garden

High quality and easy to spread. Used on lawn as we have so much clay. Hoping it will make a difference. May have to use a few more times to appreciate its full effect. Laid under compost with seeds to cover patches in grass.

This product is recommended by a lawn professional in their online videos, so I'm confident it'll make a difference on my garden, where there's some pretty thick clay. The granulated formula means it'll be easy to spread consistently using a hand spreader, and it should help my flower beds as well as the lawns. The price seems pretty reasonable for the weight. This seller also has some keenly priced fertiliser, so I may give that a go, too.