Protect your tulips and crocuses by enclosing their bulbs in a cage made of metal hardware cloth, available at home centers. The mesh openings will allow growth while deterring squirrels and other pests. Don protective gloves. Using the guide below, cut mesh with wire snippers to the desired size (it will vary by plant type and the number of bulbs you want per grouping). Fold hardware cloth around bulbs, as indicated by dotted lines.