Tropical Milkweed: Impact on Monarch Butter flies
- Oct 23, 2025
- 1 min read
Tropical milkweed can pose a threat to monarch butterflies by increasing the spread of the Ophryocystis elektroscirrh (OE) parasite and potentially disrupting their migration patterns. Unlike native milkweed species, tropical
milkweed does not die back in winter. While it serves as a food source, the
prolonged blooming period allows OE spores to accumulate, resulting in
decreased survival and reproductive rates for monarchs.
To support these beautiful butterflies, it is advisable
to remove tropical milkweed and replace it with native
milkweed species.

News Flash...Florida has officially classified Asclepaus curassavica (tropical milkweed)
as an invasive species. If you have this plant in your yard, it is advisable to remove it .




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