We rely on tropical milkweed as a host plant to feed both early and late season Monarch caterpillars. Without it we would not be able to raise as many hungry caterpillars as the native milkweeds are simply not available.
We recommend this plant because it can be started from seed during the winter and be grown indoors, ready to be eaten by spring caterpillars in April. It is incredibly heat and drought tolerant. It quickly recovers from being eaten by caterpillars and will be ready during the late summer in time to be eaten by the last generations of caterpillars.