When to repot: is it pot-bound?
Repotting is not a seasonal ritual; it is a response to what the roots and the pot are actually doing. Many plants are perfectly happy slightly pot-bound, and repotting a plant that is stressed, dormant, or struggling with water or light will not fix it — it adds stress.
The reliable signs are about the root ball itself: roots circling the pot, roots through the drainage holes, or mix that dries out far faster than it used to. Yellowing leaves or slow growth alone are usually water or light problems, not repotting signals.
General beginner information only — not a substitute for advice from your local agricultural extension service. For edible plants, use only a product that is labelled for that particular edible crop, for indoor use, and follow any harvest interval on its label; try non-chemical steps first, and never use a product that is not labelled for indoor use on that plant.
Checklist to diagnose
- Slide the plant out: are roots circling the root ball, or so dense you can barely see mix in the lower part?
- Are roots growing through the drainage holes or appearing on the surface?
- Does the mix dry out much faster than it used to, even in cooler weather?
- Are new leaves smaller than normal, or does the plant wilt between normal waterings?
- Is the plant actively growing, or stressed, dormant, or in heavy flower?
Rescue steps
- If the plant is stressed, dormant, or in heavy flower and the pot is not an emergency, wait and fix the primary problem first; repot when it is actively growing, usually in spring or early summer.
- Choose a new pot with drainage holes no more than about two inches larger in diameter than the current one — extension guidance is explicit that a much larger pot holds excess water around the roots.
- Water the plant shortly before repotting so the root ball slides out more easily, then gently tease circling roots free rather than leaving them wound tight.
- Set the plant at the same depth it grew before, fill with fresh mix around the root ball, water once to settle, and let it drain fully.
- If you do not want a larger plant, you can instead trim the outer roots, return the root ball to the same pot with fresh mix, and cut back some top growth to match.
When to give up
- Repotting is not a rescue for a plant whose roots are already rotted or whose crown has collapsed — see the root rot page first.
- If the plant declines after repotting despite steady water and light, check the roots again before repotting a second time; repeated repotting is itself a stress.
Plants on this site
These plant guides on this site already mention this problem: