How to Repot a Houseplant Without Killing It
Repotting is one of those tasks that sounds risky but is straightforward once you know the rules. Most repotting failures come from doing it at the wrong time, jumping up too many pot sizes, or burying the plant too deep.
When to repot
Repot when the plant has outgrown its container, not on a schedule. The signs:
- Roots circling the bottom or growing out of the drainage holes
- Water running straight through without soaking in
- The plant drying out far faster than it used to
- Growth that has clearly stalled
The best time is spring or early summer, when the plant is actively growing and can recover quickly. Avoid repotting a plant that is flowering or visibly stressed.
Choose the right pot
Go up one size only, roughly 2 to 5 centimetres wider in diameter. A pot that is too large holds a big volume of slow-drying soil, which is a leading cause of root rot.
The pot must have a drainage hole. This is not negotiable.
Step by step
- Water the plant a day before. A hydrated root ball holds together and slides out more easily.
- Remove the plant gently. Tip the pot, support the base, and ease it out. Never pull by the stem.
- Loosen the roots. Tease apart the outer roots with your fingers. If they are tightly circled, make a few shallow vertical cuts to encourage outward growth.
- Add fresh soil to the new pot. Put enough at the bottom so the plant will sit at the same depth it did before.
- Position and fill. Centre the plant, then fill around the sides with fresh mix. Firm it gently. Do not bury the stem deeper than it was.
- Water thoroughly. Water until it drains out the bottom. This settles the soil and removes air pockets.
After repotting
Place the plant in bright indirect light, not direct sun, and leave it alone for a couple of weeks. Do not fertilise immediately, because fresh potting mix already contains nutrients and the roots need time to settle.
A little drooping in the first few days is normal transplant stress. New growth is the signal that the repotting succeeded.
Common mistakes
- Jumping several pot sizes to “save time later”. This almost always causes overwatering problems.
- Using garden soil. It is too dense for containers. Use a proper potting mix.
- Planting too deep. Keep the soil line where it was before.
- Repotting a sick plant to fix it. Diagnose the real problem first. Repotting is not a cure for overwatering or pests.
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