Monarch caterpillars feed exclusively on the leaves of milkweed, the only host plant for this iconic butterfly species.
While some species have been found to be preferred over others, all members of the genus Asclepias can be used as a monarch butterfly host plant.
Asclepias speciosa is a native milkweed for the western half of US and Canada. This milkweed has a long bloom period and is host/nectar plant for monarchs.
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