You can just chop the mint down and it will regrow. The parsley prefers shade and lots of water and might do better re-potted in a bigger pot. You can just chop off the droopy bits for salads etc. I am not inclined to use the peat free compost as I find it very difficult to keep moist enough for potted plants.
With the mint advice online seems to be pruning and repotting. Shall I just give it a good all over trim including the long trailing bits? How short?
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A good gardener's eye sees more to be improved. Robin Lane Fox