The RHS recommends using containers which give herbs a deep root run where they can be left undisturbed.
The website reads: “Use a gritty, well-drained compost, adding up to 25 percent by volume of coarse grit or perlite to a loam based compost such as John Innes No 1.
“Keep the compost moist, but never soggy. Use balanced fertiliser to encourage leafy growth, rather than potassium-rich fertiliser that might promote flowering.
“Mint relishes moist, fertile soil, but it is not the happiest of herbs in a pot. Replant frequently, using generous pieces of root, into rich potting media, taking care to avoid over potting. Whenever it looks straggly, lift roots and repot into fresh compost.