Made in the UK by Ladbrooke, the Mini 4 Soil Blocker is a hand-held device that is pushed into a wet soil mix. Squeeze the handle, and it ejects 4 individual blocks of soil measuring 2 inches on each side. On the top is a dimple that will receive one seed. Or use the 3/4″ cubic pin to make a space for blocks from the Micro 20. Soil blocks allow the roots of plants better freer access to oxygen. When the seedling is ready, it is potted on into a 4″ soil block, and so on, before transplanting into the ground.