Description
Ditch the Plastic. Start Better Seeds.
Every serious gardener eventually figures it out — the plastic cell trays aren’t the problem, they’re just not the best option. Soil blocks are. Press your own growing medium into firm, self-contained 2-inch cubes and your seedlings get something a plastic pot never gives them: air pruning. Roots hit open air at the edge of the block, stop growing, and branch back in. The result is a dense, explosive root system that transplants without shock and takes off the moment it hits the ground.
The 4-Cell Soil Blocker makes four perfect blocks in one press. No pots. No trays. No plastic to wash, store, or throw away. Just your mix, your seeds, and cubes that are ready to plant.
What It Makes
Each press produces four 2-inch soil blocks — the perfect size for starting tomatoes, peppers, herbs, flowers, and most garden vegetables. Each block comes out with a built-in seed dimple pressed right into the top, so your seed has a home the moment the block is made. No poking, no guessing, no tools needed.
Why Soil Blocks Beat Plastic Pots
When you start seeds in plastic cells, roots hit the wall and start circling. That circling becomes root binding — and root bound seedlings struggle after transplant. Soil blocks stop that from happening. Roots reach the edge, air prunes naturally, and the plant puts all its energy into branching roots instead of tangled ones.
Fill your blocks with a rich mix of worm castings, compost, and quality potting medium and you’re giving your seedlings a head start that store-bought transplants can’t touch. The growing medium becomes the pot — loaded with nutrients, alive with microbial activity, and ready to feed your plants from the first day of germination all the way to transplant.
Built to Last
The blocker is made from galvanized steel — oxidation resistant, corrosion resistant, and tough enough to press hundreds of blocks season after season without bending or breaking down. The handle features non-slip cushioning and an ergonomic grip that keeps your hand comfortable through a full flat of blocks.
How To Use It
Step 1 — Mix your growing medium until it holds together when squeezed. A good soil block mix is slightly wetter than you’d expect — think wrung-out sponge.
Step 2 — Press the blocker firmly into your mix, packing the chambers full.
Step 3 — Place the blocker on your tray or flat surface. Grip the handle with your palm and squeeze the spring mechanism with your fingertips while pressing down.
Step 4 — The spring releases the blocks cleanly onto your surface — four perfect cubes, each with a seed dimple ready to go.
Step 5 — Drop your seed in the dimple, mist with water, and watch them grow.
Pro Tip From Uncle Jim
Mix worm castings into your blocking medium. Even a 20% ratio of castings to potting mix gives your seedlings a living, nutrient-dense start that synthetic fertilizers just can’t replicate. Your germination rates go up. Your transplant survival goes up. And your garden thanks you for it all season long.
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Questions?
800-373-0555 — Monday through Friday, 10am to 6pm Eastern
sales@unclejimswormfarm.com
