Planting in pots: a practical guide

Decide what the pot needs to do

Start with the location and purpose. A container might mark an entrance, add colour to a patio, hold herbs or keep a plant away from compacted ground. Note how much sun the position receives, whether it is exposed to wind, and how easy it is to reach with water.

Do not choose a plant only because it looks good at the garden centre. Check its eventual size, light needs and tolerance of the position. A tall plant in a narrow exposed pot may become unstable, while a thirsty plant in a difficult-to-reach corner can turn into a daily chore.

Choose a workable container

The container needs drainage holes. Without them, water can collect around the roots and cause problems, especially in wet weather. Raise the pot on suitable feet, bricks or another stable support where this helps water escape and keeps the holes clear.

Size affects both the plant and the maintenance. A larger container usually holds more growing medium and dries more slowly than a small pot, but it is heavier and harder to move once planted. Choose a place first if the finished container will be difficult to lift.

Check that the rim, base and route are safe for the people using the space. Keep entrances, paths, steps and gates clear. If a container is being moved, agree who will move it and whether the surface can take its weight.

Match the plant to the pot

Use the rootball and the plant’s expected growth to guide the container size. A pot that is only slightly larger than the rootball may be suitable for a single specimen, while a plant intended to stay for longer will need enough room for healthy growth. Avoid a much larger pot simply to make a display look fuller; excess growing medium can stay wet around a small root system.

For a mixed container, group plants with similar light, watering and seasonal needs. Leave space for growth and do not bury stems or trunks under extra compost. If you are unsure whether a plant is suitable, get it identified before planting rather than relying on a label that does not describe your position.

Plant and water carefully

Use a suitable growing medium for the plant and firm it gently around the rootball. Leave room below the rim so water can be applied without washing material over the edge. Water thoroughly after planting and check that excess water can drain away.

Containers generally need more regular watering than plants in open ground because their root space is limited. Check the compost rather than following a fixed routine in every season. Hot, windy positions and small pots can dry quickly; cool or wet conditions can create the opposite problem.

Keep an eye on the plant after planting. Look for wilting, water running straight through, poor drainage, roots becoming crowded or growth that is leaning into a route. Move or repot only when the plant, container and access make that sensible. Large or heavy pots should not be handled alone if doing so creates a risk.

Include pots in the maintenance brief

Record each container’s location, plant, watering responsibility and any seasonal action. This stops a request for general garden maintenance from leaving a row of pots without an agreed plan. Decide whether the gardener is expected to water, deadhead, weed, replant or only maintain the surrounding area.

PW Gardening Service lists planting within its garden-maintenance scope, alongside weeding, borders, tidying and seasonal cutting back. Contact the team with photographs of the containers or intended position, access details and the help you want to discuss. Do not assume that plant supply, specialist design or ongoing watering is included until it has been agreed.

Further reading

The RHS guide to growing plants in containers covers container choice, compost, planting, drainage and aftercare. Use its plant-specific advice alongside the conditions in your own garden.