Polyhalite Fertiliser | 4-in-1 Mineral (K, Ca, Mg, S) Size:60kg few flowers: stretch to 5–6

few flowers: stretch to 5–6 weeks

Pre-fermented so it is biologically active from day one

unlike EDTA

Use both: seaweed meal for soil building

Polyhalite Fertiliser | 4-in-1 Mineral (K, Ca, Mg, S) Size:60kg few flowers: stretch to 5–6Overview The Science How to Use FAQ Polyhalite fertiliser four macronutrients in one Yorkshire mineral Mined in Yorkshire 4 Macronutrients EU Organic Approved Slow Release Chloride Free Recyclable Packaging Polyhalite is a naturally occurring mineral fertiliser that supplies four macronutrients potassium, calcium, magnesium and sulphur from a single Yorkshire crystal. It's mined from beneath the North Yorkshire coast at Boulby the world's only