Small, Live Plant Plug of Narrowleaf Milkweed - Mexican Whorled Milkweed, the West's Primary Food and Host Plant for Monarch Butterflies Small Plant 1" Square Plug - Narrow Leaf Milkweed or Mexican Whorled Milkweed, the West's and California's Primary Monarch Butterfly Food and Host Plant Narrow Leaf Milkweed is the Monarch butterfly's Host for Egg Laying, Feeding, and Hatch and the tiny Catepillars Feed on the Milkweed. They form Chrysilises on the plant for their Metamorphosis It Takes 2 generations of Monarchs to Migrate in each direction (Canada to Pacific Grove and Mexico) and they need milkweed along their paths Plant These Seeds Yourself and Give as Gifts to Help Save the Monarch Butterfly