The Multi series Soil Blockers are used standing upright. They are pushed into a wet soil mix, and when the handle is squeezed, out pop identical soil blocks for seed starting. The Multi 12 Soil Blocker produces twelve 2″ cubes that are ready to receive large either seeds or the 3/4″ soil blocks from the Micro 20. When the seedlings are ready, pot them on into the 4″ soil block produced by the Maxi 1, or directly into the ground if the soil is warm enough. The unit stands 78cm (30inches) tall, and is manufactured by Ladbrooke in the UK. Soil Block Recipe.