Volcanic rock, 10kg
Volcanic rock is absolutely pH-neutral and has the ability to store water and nutrients without losing porosity and permeability. This means that the root zone is always well ventilated and moist, an ideal climate for healthy and strong roots.
Volcanic rock is an optimal hydrosubstrate as it does not compact and provides optimal conditions for healthy plant growth. It prevents the spread of fungi, nematodes and insects and does not give off any unpleasant odours.
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