Mint is best planted in the spring as young plants, it is a vigorous plant and will spread all over if planted directed into the ground so it’s ideally suited to large pots filled with multi-purpose compost. It requires plenty of water, especially during hot dry weather. Plants will finish flowering in the summer, once this happens cut the flowered shoots back to 5cm above the surface of the compost. Plant different varieties in different pots to avoid them losing their individual scent and flavour. You can rejuvenate congested clumps by upturning your pots, removing the rootball, splitting it in half and repotting a portion in the same container with fresh compost.
Mint will die back over the winter period but can be picked between late spring and mid-autumn. Pick regularly to keep plants compact and to ensure lots of new shoots. Mint is best fresh but to ensure supply during winter months wash well, dry, chop and then freeze.