Potting On

Seedling Care

Potting on moves an established seedling or rooted cutting into a slightly larger container before it becomes pot-bound. It maintains steady growth and creates a stronger root system for planting out. The aim is not to give every plant a huge pot, but to match container size and compost to its next stage.

How to do it

Check whether roots are visible at drainage holes or whether a plug holds together when eased from its cell. Choose a clean pot only one size larger, with drainage holes. Put a little peat-free multipurpose compost in the base and remove the plant carefully, supporting its rootball. Loosen circling roots lightly only if they are dense. Set the plant at its previous depth, fill around it with compost and firm gently. Leave a small watering space below the rim. Water thoroughly until excess drains away, then place the pot in appropriate light and warmth. Continue watering as needed and begin modest feeding only when the compost's initial nutrients are being used.

When to do it

Pot on whenever plants have filled their current modules or pots, most often from spring through early summer. Fast-growing tender crops may need more than one move before planting out. Avoid potting on into cold, waterlogged compost during winter, when growth is slow and roots are less likely to establish quickly.

Tips

A pot that is much too large stays wet for too long and can slow rooting. Always use fresh peat-free compost rather than spent material. Water before potting if the rootball is dry, but do not handle sodden compost. Keep labels with the plant, especially when several varieties are being grown together.

Potting On: frequently asked questions

How does potting on work?

Check whether roots are visible at drainage holes or whether a plug holds together when eased from its cell.

When should I do potting on?

Pot on whenever plants have filled their current modules or pots, most often from spring through early summer.

What are some tips for potting on?

A pot that is much too large stays wet for too long and can slow rooting.

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General guidance for UK gardens. Page updated 19 Sep 2026.