How often, and why the answer is rarely
A jade plant is happy tight in its pot. Restricted roots give you shorter internodes, thicker stems and a better chance of flowers on a mature plant, which is exactly what most people want. A young plant in active growth wants a move every two years, and a large old specimen can sit in the same pot for four or five years with only a top dressing.
The reason to be cautious is drainage. A large volume of compost around a small root ball holds water in the middle where no roots are drinking it, and that damp core is where root rot starts.
| Sign | What it means | Action |
|---|---|---|
| Roots coming out of the drainage holes | The pot is full | Move up one size in the next warm spell |
| Water runs straight through in seconds | Little compost left, roots have filled it | Repot, or the plant will dry out constantly |
| The plant tips over when the compost is dry | Top heavy for the pot | A heavier pot of the same size will often fix it |
| White crust on the compost surface | Mineral build up from hard water and feed | Scrape off the top inch and replace it |
| Growth stalled but roots not filling the pot | Light or watering, not the pot | Do not repot. Fix the position first |
| Compost stays wet for weeks | Wrong compost or a pot far too large | Repot into gritty mix in a smaller pot |
The pot and the compost
Two choices decide how forgiving your watering can be. Unglazed terracotta breathes through its walls and dries a pot several days faster than plastic, which for a succulent is entirely an advantage. Compost should feel gritty in the hand and fall apart when dry rather than forming a solid block.
- Go up one inch in diameter, no more From a four inch pot go to five, not to seven. There should be roughly half to three quarters of an inch of new compost around the root ball, not two inches.
- Choose terracotta, and heavy for a tall plant Terracotta dries faster and its weight steadies a top heavy plant. A tall jade in a light plastic pot will fall over and crease its leaves repeatedly.
- Mix roughly half grit into the compost Cactus compost cut with an equal volume of coarse pumice, perlite or fine gravel is right. A handful of the mix squeezed damp should crumble apart, not hold its shape.
- Check the drainage hole is genuinely open One large clear hole is essential. Cover it with a piece of mesh rather than crocks, which just create a wet layer at the base of the pot.
Repotting step by step
Do this in warm weather while the plant is actively growing, so damaged roots heal quickly. Repotting a cold, dormant plant leaves open wounds sitting in compost for months. Everything is done dry.
- Let the compost dry out first Stop watering a week beforehand. Dry compost falls off the roots cleanly, wet compost tears them. This alone prevents most repotting losses.
- Ease the plant out and clear the old compost Squeeze a plastic pot or run a knife around a terracotta one, and lift the plant by its trunk base. Crumble away about half to two thirds of the old compost with your fingers.
- Inspect and trim the roots Healthy roots are pale, firm and slightly springy. Cut away anything black, hollow or slimy with a clean blade. Trim long circling roots back by a third to encourage new fibrous growth.
- Pot at the same depth, firming gently Set the plant so the trunk sits at exactly its old soil line. Burying the stem deeper to steady a top heavy plant causes rot. Tap the pot to settle the compost rather than pressing it hard.
- Do not water for a week Cut roots need time to seal. Stand the plant in bright shade, out of direct sun, and give the first light watering after five to seven days.
- Return it to full sun gradually After the first watering, move it back to its usual bright position over a week or so. Expect a few leaves to drop, which is the usual response to disturbance.
Record the date and the pot size each time you repot. Knowing that a particular plant was last moved three springs ago, and into what size, saves you from repotting on a guess and from moving a plant that did not need it.
Alternatives to potting up
Sometimes the right answer is to keep the pot the same. A large old jade plant that has reached the size you want does not need to keep growing, and there are two ways to hold it where it is.
| Method | When to use it | How |
|---|---|---|
| Top dressing | A big specimen you cannot lift out | Scrape off the top inch of compost and replace with fresh gritty mix |
| Root pruning back into the same pot | You want to keep the plant at its current size | Trim a third off the root ball, prune some top growth to match, repot dry |
| Same size pot, fresh compost | Old compost has gone dusty or crusted | Clear the roots and return the plant to a clean pot of the same width |
| Splitting a crowded pot | Several plants sharing one pot and competing | Separate at the roots and pot each one individually |
What can go wrong afterwards
Leaf drop after repotting is normal and almost always resolves. The failures come from watering a freshly cut root system or from moving into a pot far too large, and both show up within a month.
| Symptom after repotting | Cause | What to do |
|---|---|---|
| Leaves dropping plump for two weeks | Normal disturbance and light change | Nothing. Hold off water and wait for new tip growth |
| Leaves going soft and yellow | Watered too soon after root trimming | Stop watering entirely and check the stem base for rot |
| No new growth after two months in the growing season | Pot too large, roots sitting in wet compost | Lift it, inspect the roots, and go back down a pot size |
| The plant leans or works loose | Compost not settled or pot too light | Top up compost around the root ball and use a heavier pot |