What do the ingredients of Clay & Compost bring to the garden and its plants?
Mature compost improves soil structure by bringing humus into contact with sand particles. This boosts moisture-holding as well as nutrient holding capacity. It also improves soil structure by adding air spaces, which you can feel when walking as the soil is soft, not compact and hard to the tread.
Adding a mere 1% of humus to the soil can increase moisture-holding by as much as 17 litres per square metre, which is a massive result. Nutrient holding capacity is called Cation Exchange Capacity (CEC)
and it's a term that describes the soils ability to attract and hold electrically charged particles that make up the mineral nutrient elements that plants need in order to photosynthesis. Our sands have a very low CEC meaning that nutrients are rapidly leached through the soil. This makes fertiliser applications ineffective as the bulk of the nutrients, as much as 60% bypasses the root system of the plants we were aiming to fertilise.