Repotting Indoor Plants: When to Repot + The Pot Size Rule That Prevents Root Rot
Repotting Indoor Plants: When to Repot + The Pot Size Rule That Prevents Root Rot
Repotting is one of the best things you can do for indoor plants — but repotting too often (or into a pot that’s too big) causes more problems than it solves.
When should you repot? (clear signs)
- Roots growing out the bottom drainage holes
- Soil dries out very fast (watering doesn’t last)
- Plant stops growing during the growing season
- Plant looks unstable / top-heavy
- Soil has become compacted and water runs straight through
The pot size rule (don’t skip this)
Go up only 1 size — typically about 2–5cm wider than the current pot.
Oversized pots hold extra wet soil, which increases the risk of overwatering and root issues.
Best time to repot in South Africa
- Best: spring to early summer (plants recover faster)
- Avoid: very cold winter weeks unless it’s an emergency (severe overwatering/rot)
How to repot (simple step-by-step)
- Choose a pot with drainage holes.
- Water the plant lightly the day before (optional) so roots aren’t brittle.
- Slide the plant out and gently loosen tight roots.
- Add fresh, well-draining mix to the new pot.
- Place plant at the same height as before (don’t bury the stem).
- Fill around the sides, press lightly, and water once to settle.
- Place in bright indirect light for 7–10 days while it recovers.
Aftercare (what not to do)
- Don’t fertilise immediately (wait 2–4 weeks).
- Don’t put it into harsh direct sun.
- Don’t water again until the top soil dries (finger test).
