On the Starting Seeds page, I showed how to use a soil block mold for starting seeds. After much experimenting, I have made a few modifications to the process.
- I no longer try to pack the soil mixture in tighter than I can get by just pressing down several times. I had even tried using blocks of wood to pack it in tighter. While that gave good results, it was pretty tough on the hands, so I went back to the method recommended by the manufacturer. I still try to pack it in as tightly as possible, but only by pressing the mold into the mixture.
- I no longer use a bucket to press the mold into the mixture – I now use a stainless steel warming tray that I bought from a used restaurant supply store. This is much easier to work with and it allows me to make much better use of the wet soil mixture than I could with the rounded sides of a bucket.
- I have added galvanized hardware cloth in the bottom of the seed trays. Previously, the blocks would get damaged when I had to move the trays. The stiff, flat bottom that the hardware cloth provides keeps the blocks from bumping into each other.

Hardware cloth lines the bottom of the tray to keep the blocks stabilized when moving the tray. This is a big help in keeping the blocks from being damaged.

The work area. From front to back: water bucket to clean blocker between moldings, stainless steel warming tray where the blocker is packed, seedling tray where blocks are placed when finished.

Packing the growing mixture into the soil blocker.

A garden knife is used to cut away excess from the bottom.

Wipe away excess from the sides using your fingers.

Four soil blocks being extracted from the mold and onto the seed tray.

The soil blocker is rinsed off between uses. Keeping it clean helps make the blocks uniform.

When the blocks have been extracted from the mold, it is not uncommon for part of the block to separate. Use a metal putty knife to gently press the block back into shape.

Use two putty knives together to separate the blocks. They need to have enough air space between them to keep the roots of one block from growing into an adjoining block.






























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