How to choose a bonsai pot

1. Choose for the stage your tree is at

A small pot does not create a mature bonsai on its own. Avoid making a large root reduction simply because you have bought a beautiful container. If a tree is weak or recovering, ask for species-specific advice before changing its root environment. Further reading: containers at different development stages.

2. Measure the tree, then check the usable space

Record the tree's height from the soil surface, its widest canopy spread and the trunk thickness just above the surface roots. Also note the current pot's internal length, width and depth. At the next appropriate repotting, assess the actual root spread and thickness; do not disturb healthy roots out of season just to take a measurement.

Traditional proportions: useful starting points

• Oval or rectangular pots: a length around two-thirds of the tree's height is a familiar display guideline.
• Depth: the visible depth of the pot is often compared with the trunk thickness just above the surface roots.
• Wide or unusually shaped trees: judge the canopy spread and visual balance as well as height. A broad crown can need a wider container.
• Round, square, cascade and group plantings: do not apply the oval-pot formula mechanically. Their outlines, planting arrangements and root requirements differ.

These are aesthetic conventions, not specifications for the root space. Roots, species, tree condition and watering needs take priority. Further reading: traditional pot proportions.

An oval or floral outline offers less space at its corners than a rectangle with the same maximum dimensions. The opening may also be wider than the bottom. For a close fit, compare the whole root shape with the usable interior—not just the largest number in the listing.

3. Match the pot to the tree's character

Look at the trunk before looking at the species label. Is it upright or leaning, thick or slender, angular or flowing? Then consider the canopy and bark. The pairings below are options to explore, not fixed rules.

Conventional pairings are illustrated in Bonsai Empire's pot guide. For the tree forms themselves, see its bonsai styles reference.

Small details change the overall effect

A thick rim, strong feet or sharp corners can make a pot feel more substantial. Rounded edges and an understated rim soften it. Drum pots, with their round bodies and sometimes studded decoration, can offer a different character from a plain bowl. Floral or lobed outlines introduce a more decorative rhythm.

Older writing often calls these qualities “masculine” and “feminine”. You can make the same comparisons using words such as strong, rugged, light or flowing. A species does not have to belong to one category. Further reading: Harry Harrington and Vic Harris on pot shape and character.

4. Shallow versus deep pots

Do not assume that “shallow” always means dry or “deep” always means wet. Soil particle size, root density, drainage, exposure and watering all matter. A wide, shallow container can expose much more soil surface than a narrower one of similar volume. Further reading: container shape and the growing environment.

Check moisture rather than relying on a fixed watering timetable. In the UK, a windy summer day and a cool, wet week can place very different demands on the same tree. Shallow bonsai containers also leave roots exposed to winter conditions; pot frost resistance does not make the tree's roots frost-proof. RHS guidance on bonsai care.

5. Why cascade pots are different

In a full cascade, the descending part of the tree extends below the pot's base. In a semi-cascade, it drops towards or below the rim but remains above the bottom of the container. This is why an ordinary upright-tree sizing formula is a poor guide to choosing a cascade pot. See the cascade style definitions.

A deeper pot provides a stronger visual base beside the falling line. Its mass and footprint can help with balance, but height alone does not guarantee stability. Consider the combined weight and position of tree, roots, soil and container. The tree needs secure anchorage, and the bench or stand must safely support the whole arrangement.

Before buying, use a front-on photograph or a simple outline drawing to check three things: whether the branch clears the rim, whether there will be enough space beneath it, and whether the pot looks in proportion. Check the proposed stand height too. A semi-cascade may suit a moderately deep pot rather than the tallest available. Further reading: cascade and small-tree containers.

6. Glaze, colour and traditional or modern choices

Traditional pairings often place conifers in subdued unglazed pottery and deciduous, flowering or fruiting trees in glazed pots. These are visual conventions, not a requirement that a species must have a particular finish. See examples of traditional pairings.

Our suggestion: photograph the tree from its intended viewing side and compare two or three pot outlines underneath it. Try one restrained option and one more adventurous option. Look at the pair from a distance, not just close up. Ask whether the pot strengthens what you like about the tree.

Consider the seasons too. A pot chosen for summer leaves will also be seen beside bare winter branches, blossom or autumn colour. A neutral finish gives flexibility; a stronger contrast can make a seasonal feature stand out. There can be several successful choices for the same tree. Further reading: colour and alternative pairings.

Explore glazed pots  ·  Explore unglazed pots

7. Check the details that photographs cannot settle

• Drainage and anchorage: check for drainage holes and a suitable way to secure the tree. Feet should allow water to escape beneath the pot. A decorative bowl without drainage is not a direct substitute.
• Material and outdoor use: check the individual listing for frost or outdoor-use guidance. A glazed surface alone does not prove frost resistance.
• Interior shape: narrowing sides, inward rims and a small base can reduce usable root space and make later removal harder. Ask for internal measurements if the fit is close.
• Support: a pot should sit securely. A tall tree or cascade also needs a stable bench or stand; consider wind exposure.

Further reading: the practical requirements of bonsai containers.

Use a growing medium appropriate to the tree and your conditions. Adding stones to the bottom of a poorly draining container is not a reliable fix for drainage; the holes and growing medium need to work together. University of Illinois Extension explains container drainage.

Trays: measure the base, not just the rim

A matching-looking tray is not necessarily a matching size. Compare its usable inner base with the pot's feet and base, allowing room for it to sit flat. Check whether the tray is included or sold separately. Empty collected drainage water; do not leave the pot standing in it. Browse drip and humidity trays.

Common questions