Photo: A pot to grow into — Sudzie · CC BY-SA 4.0. Photo cropped from the original.
Pot and soil
A pot to grow into
MYTH
Give it a much bigger pot and the plant will grow faster.
FACT
The roots can't use the water in all that extra soil, so it stays wet for a long time. Instead of growing into it, the roots can rot – especially in plants that grow slowly.
What actually matters
- Only 1–2 inches widerChoose a pot 2.5–5 cm (1–2 in) wider than the old one and not much deeper.
- Signs it's timeRoots poke out of the drainage hole or wrap around the whole root ball. Or the plant wilts soon after watering.
- In spring, while it growsRepot in spring or summer, once the plant is actively growing. Leave dormant and budding plants alone.
- Big new pot, wilting?If the leaves yellow and droop after a move to a big pot while the soil is soggy, don't add water: the trouble is too much water, not thirst. Water only once the soil starts to dry, or move the plant to a pot just bigger than its roots.
- Some like it snugSome plants do best in a tight pot, for example amaryllis and Christmas cactus. An orchid needs a pot just big enough for its roots: if they still fit the old one, keep it.
Sources: RHS, Illinois Extension, Iowa State Extension, Clemson Extension, Penn State Extension.