Compost for Containers

Getting Started

Container compost has to supply moisture, air and nutrients in a small root space. Most annual flowers, herbs and vegetables perform well in peat-free multipurpose compost. Longer-lived plants need a more stable mix, while acid-loving plants need compost with the correct acidity from the outset.

How to do it

Use fresh peat-free multipurpose compost for most annual crops, salad leaves and seasonal displays. Water it gently before planting if it is very dry, then firm plants lightly without compacting the mix. For long-term pots, perennial herbs, shrubs and small trees, use John Innes loam-based compost or blend it with peat-free multipurpose compost; its weight helps anchor roots and retain nutrients. Plant blueberries only in ericaceous compost. Leave a 2 to 3 cm watering gap below the rim. Each season, remove spent annual compost from containers and refresh perennial pots by replacing the upper layer with suitable new compost.

Best plants

Peat-free multipurpose compost suits tomatoes, peppers, lettuces, basil, annual flowers, beans and strawberries. John Innes loam-based compost is particularly useful for rosemary, sage, bay, fruit bushes, small trees and long-term ornamental pots. Blueberries, heathers and other acid-lovers need ericaceous compost. Mediterranean herbs also appreciate added grit or coarse material for freer drainage in sunny pots.

Tips

Compost shrinks and loses nutrients over time, so do not expect last season's mix to perform like new. Avoid garden soil in containers because it compacts and drains poorly. Keep opened compost covered and off cold ground where possible. Feed established hungry crops during the season, following the fertiliser label rather than guessing quantities.

Compost for Containers: frequently asked questions

How do I get started with compost for containers?

Use fresh peat-free multipurpose compost for most annual crops, salad leaves and seasonal displays.

What are the best plants for compost for containers?

Peat-free multipurpose compost suits tomatoes, peppers, lettuces, basil, annual flowers, beans and strawberries.

What are some tips for compost for containers?

Compost shrinks and loses nutrients over time, so do not expect last season's mix to perform like new.

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General guidance for UK gardeners. Match plant choices to your light and shelter. Page updated 19 Sep 2026.