Root Space & Sizing Dynamics
Repotting & Pot Size Calculator
Determine when to repot and calculate safe new pot diameter (+1" to +2" max) with fresh soil volume requirements.
Root Space Dynamics
Why we do not jump two pot sizes
A small root ball in a large volume of wet mix is how rot starts. Go up about two inches of diameter unless the plant is truly rootbound and the new pot still drains. This page sizes that jump. After a repot, water less often until you see a new leaf.