|I have Cast Iron plant all around my house but the tips are all turning brown and torn looking. I keep the old leaves pulled out but it ruins the appearance with all of them looking bad. Do they need feeding and with what? It is a pretty wet location.
Those are old leaves suffering from the ravages of time, weather and perhaps some disease. Cut them off at the ground and in a short time new, healthy foliage will shoot up to replace them. This can be done at the end of winter or even in mid to late summer if you like to keep the planting looking good.
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