Giant hogweed looks like an enormous cow parsley plant. When fully grown, it can reach heights of one to two metres. The Woodland Trust says its stems are green and often have purple blotches ...

The Jekyll and Hyde carrot family, of which giant hogweed is a member, has edible plants such as angelica, coriander, fennel, pennywort, pignut and sweet cicely on one side, but ground elder, plus the ...