We grow tropical milkweed as a supplemental 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 have not experienced an issue with it inhibiting Monarchs from migrating, nor it being a source of OE because we always plant new plants each year.
We are aware of and have read various research studies discussing the pros and cons of tropical milkweed. Some experts are opposed to using it, and we appreciate and understand their position. However, we think based upon our observation and experience that the benefits are too great to deny–especially when native food sources are not available. We feel it is better to feed hungry Monarch caterpillars this milkweed as opposed to letting them starve.
This species of milkweed is a fast grower and quickly rebounds from being eaten by hungry caterpillars. It tolerates neglect and grows well in pots.