"When am I supposed to repot my houseplants? And how?" — every plant owner wonders about this at some point. Repotting is a roughly once-a-year event, and as long as you get the timing and steps right, it's very manageable even for beginners.
In this article, we'll cover the signs that it's time to repot, the best season to do it, and 5 simple steps for getting it right.
Signs it's time to repot
If any of these apply, it's worth considering a repot:
- Roots are growing out of the drainage holes (= the pot is packed with roots)
- The soil dries out very quickly after watering (= there's more root than soil in there)
- Growth has slowed down noticeably (= the roots have filled the pot and have nowhere to go)
- It's been in the same pot for 2+ years (= the soil has lost its nutrients and its structure is breaking down)
"Roots out the bottom" and "2 years in the same pot" are the clearest signals. On the flip side, a plant you just brought home does not need repotting right away.
The best timing (spring to early summer)
Repotting is a major stress on a plant, so the golden rule is to do it when the plant is at its most vigorous.
- Best: April–June (new growth is starting, and the peak summer heat hasn't arrived yet)
- OK: September–October (once things have cooled down)
- Avoid: The height of summer (above 35°C / 95°F) and winter (dormancy) — plants struggle to recover
If you repot "whenever," you risk putting the plant through all the stress with none of the benefit.
What you'll need
The bare minimum:
- A pot one size up (3–5 cm / 1–2 inches wider than the current one)
- Potting mix for houseplants (a pre-blended mix from any garden store)
- Drainage stones (to improve drainage at the bottom)
- A pot mesh screen (to keep soil from washing out of the holes)
- Newspaper or a tarp (to protect your work surface)
- Scissors or pruners (for trimming damaged roots)
- A chopstick or thin stick (for settling soil into gaps — optional)
"One size up" is the key phrase. Jumping to a much bigger pot means the soil stays wet too long, which leads to root rot.
The 5 simple steps
Step 1: Prepare the new pot
Lay the mesh screen over the holes, add 2–3 cm (about an inch) of drainage stones, then fill about a third of the pot with fresh soil.
Step 2: Remove the plant from its old pot
Tap around the sides of the pot to loosen the soil, then slide the plant out. If the roots are packed in tight, turn the pot upside down and ease the whole root ball out.
Step 3: Loosen the old soil and tidy the roots
Gently brush away the old soil around the roots by hand (no need to remove it all). If you find overly long roots or any that are black and rotten, trim them off with scissors.
Step 4: Plant it in the new pot
Set the plant in the center of the new pot and fill in around it with fresh soil. Poking the soil down with a chopstick helps fill any air gaps. Stop filling about 2 cm (an inch) below the rim, and you're done.
Step 5: Water and rest
Water thoroughly (until it runs out the bottom), then keep the plant in partial shade and undisturbed for 1–2 weeks. Avoid direct sun and dry spots.
3 things not to do
Common beginner mistakes when repotting:
1. Jumping to a much bigger pot
"I want it to grow big, so I'll skip ahead two sizes" — this leaves so much soil that it never dries out, and root rot follows. One size up only is the rule.
2. Fertilizing right after repotting
Immediately after repotting, the roots are damaged and can't absorb fertilizer. Worse, there's a real risk of fertilizer burn — so hold off on feeding for at least a month.
3. Repotting a struggling plant
Repotting a plant that's dropping leaves or clearly unwell, hoping "a change of scenery might help," usually backfires. Let it recover in its current pot first. Repotting is a procedure for healthy plants.
Aftercare
The 2 weeks after repotting are like a hospital stay for your plant. It needs slightly different treatment than usual:
- Let it rest in partial shade
- Water as usual (once the soil dries out)
- No fertilizer
- Don't move it around (keep its spot consistent)
Once the leaves perk back up after a couple of weeks, gradually return the plant to its usual spot.
Repotting is your plant's once-a-year move to a new home. Follow the steps and little can go wrong — just remember the timing, and that "one size up" rule.