Occasional pruning is beneficial for pink princess philodendrons. Carefully trim away any unusually large, ragged, damaged or excessively old leaves using sterilized shears. This forces new young growth from the base which have better pink variegation. Only remove up to 20% of foliage at one time or it risks stressing the plant severely. You may also prune away overgrown, top heavy stems to restore a neat, compact appearance. Use the cut portions for propagation in water!