Split a batch of mix by parts into each ingredient.
A mix described in parts, like 2:2:1, assigns each ingredient a share of the total proportional to its part count. Reproducible potting mixes keep seedlings and containers consistent, which is why recipes are written in parts not volumes.
Potting Mix Ratio
Each ingredient = total ÷ sum of parts x its own parts
Each ingredient = total ÷ sum of parts x its own parts A mix described in parts, like 2:2:1, assigns each ingredient a share of the total proportional to its part count.
Reproducible potting mixes keep seedlings and containers consistent, which is why recipes are written in parts not volumes.
This calculator takes 4 inputs: Parts ingredient A, Parts ingredient B, Parts ingredient C, Total batch size. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.