How to Repot a Plant Without Killing It

Repotting is one of those things that sounds scary and is actually simple — if you avoid the two mistakes almost everyone makes: pot too big, done at the wrong time of year.

How to tell it's time

• Roots poking out of the drainage hole or spiralling on the soil surface.
• Water runs straight through with almost no absorption.
• The plant hasn't grown at all for a full season.
• You can lift the plant out and the root ball holds pot shape.

When to do it

Early spring is ideal — the plant is waking up and will fill the new pot fast. Avoid repotting in winter unless you're rescuing from root rot; the plant won't push new roots and the wet extra soil sits sour.

Choose the right pot

Only go up 2–4 cm in diameter. A pot too large holds too much wet soil around too few roots and reliably causes rot. Always choose a pot with drainage — a cache pot (decorative outer pot) is fine as long as the plant sits in a smaller nursery pot inside.

Step by step

• 1. Water the plant a day before — moist roots handle disturbance better.
• 2. Gently tip out. Squeeze the sides of a plastic pot; run a knife around a ceramic one.
• 3. Loosen the outer roots with your fingers. If they're circling tightly, tease them apart or slice four vertical cuts down the sides — this triggers new root growth outward.
• 4. Trim any brown mushy roots with clean scissors.
• 5. Add fresh mix to the new pot, position the plant so the soil line matches its old height, then fill around and press gently.
• 6. Water thoroughly until it runs from the drainage hole. Don't fertilize for six weeks.

Avoiding transplant shock

Some leaf droop, colour dulling, or a paused growth phase is normal for 1–3 weeks. Keep the plant out of direct sun, hold humidity a bit higher than usual, and do not repot again to 'fix' it.

If your repot goes sideways, PlantMe's diagnosis tool tells overwater from shock from root rot from a single photo.