What do you do with hollyhock s once they've finished flowering for the summer?
Cut them down to the basal leaves or about 2" from the ground. If you don't have any basal leaves, pull the stem and roots. Many hollyhocks are biennial and die after flowering. I wouldn't compost the material unless you are sure it is free of any fungal disease, a common hollyhock problem. Pick up any fallen leaves and other plant material.