Tropical Milkweed: To Plant it or Not
"Satterfield, like other scientists, believes the increased availability of Asclepias curassavica, commonly known as Tropical milkweed, coupled with our warmer winters, may have an unhealthy impact on Monarch butterflies and their migration. The science is undetermined on that question..."
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Here is a link that might be useful: Tropical Milkweed: To Plant it or Not, itï¿½s Not a Simple Question