>tropical milkweed may effectively sustain monarch larvae, the perennial growth of the plant takes ill effect on the monarchs' migratory patterns and may have o

>tropical milkweed may effectively sustain monarch larvae, the perennial growth of the plant takes ill effect on the monarchs' migratory patterns and may have other physiological effects. from [Wikipedia](https://en.m.wikipedia.org/wiki/Asclepias_curassavica https://en.m.wikipedia.org/wiki/Asclepias_curassavica)