Johnny's Selected Seeds Seed Starting
Soil Blocking Kit (2-block maker)
Stainless steel
Metal mold compresses soil mix into blocks, eliminates plastic seed trays entirely.
Price$30
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Why we picked it
Soil blocking presses potting mix into freestanding cubes, so seedlings grow in soil held together by soil. Roots air-prune when they reach the block edge, and transplant shock mostly disappears along with every cell tray in the shed. Johnny's is the employee-owned Maine seed house market growers already order from, and the blocker is solid metal.
What it’s made of
Stainless steel mold. Chosen for what it’s made of, not what it’s wrapped in.
- Stainless steel
- Food-grade and near-indestructible. Won't shed microplastics.
Guide · 3 min read
A garden with less plastic in the soil
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