Use insert pins with the 2" Soil Blocker, 20 Block or the 12 Block Professional Floor Blockers (not the Mini-Blocker or the 4" Soil Blocker). Makes indentations in larger blocks to accept smaller blocks or seeds and cuttings. Cubic Pins are used for large seeds or blocks made for the Mini Blocker. 5/8" Seed Pins make an indentation for seeds. 1" Dowel Pins makes a deeper hole for cuttings or large seeds. A great source of information on how to use soil blockers is the Soil Blocker Booklet by David Tresemer.
In Europe, free-standing blocks of soil, rather than peat pots or seed flats, are almost universally used for starting vegetable and flower seeds. No containers are needed. To make the soil blocks, just fill a blocker with thoroughly moistened potting mix (Quickroot Soilless Potting Mix is perfect), set the blocker on a seed flat, and release. With one stroke you’ll create multiple soil blocks, each with a small depression in the top for the seed. When the seedlings are ready, plant them in the ground or bring them along further by dropping the soil blocks into openings in the tops of larger soil blocks (all discussed in the product descriptions). It is important to keep the soil blocks well watered with a fine mist. Imported from England, our soil blockers are the highest quality on the market.