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Our Seed Starting Soil Calculator has been calculated to work with the products sold by Growseed expertly designed to help you determine the exact amount of soil needed to fill various trays and cells for your seed-starting endeavors.

Whether you're a seasoned gardener or just getting your hands dirty for the first time, our calculator is the perfect tool to ensure that every seed has its ideal starting environment.

Precision is key in gardening, and our calculator takes the guesswork out of the equation. Save multiple trips buying soil, this is how many trays and cells each standard-size compost bag will fill.

Tray Type Volume (liters) 10ltr Compost 20ltr Compost 30ltr Compost 50ltr Compost 100ltr Compost
Lightweight Half Tray 1.64408 6 12 18 30 60
Lightweight Full Tray 1.64408 6 12 18 30 60
Microgreen Tray 2.53664 3 7 11 19 39
Compact Root Trainer 4.752 2 4 6 10 21
Rapid Root Trainer 6.048 1 3 4 8 16
Deep Root Trainer 9.072 1 2 3 5 11
Long Life Root Trainer 17.86 0 1 1 2 5