Pre-fabricated plant pit realised with 4 hollow concrete curbstones, which can buffer net 200 litres of water (more than 800 litres in combination with good topsoil). This water will be slowly released around the rootball and into the surrounding soil. Unique design of the curbstone permits and encourage the roots to develop outside the plant pit. The plant pit will support rootball and tree, and provide oxygen to the roots.