https://www.nwf.org/Garden-For-Wildlife/About/Native-Plants/Milkweed.aspx How do Chemicals in Milkweed Benefit Monarchs? The bad taste and toxicity of both the larvae and adults are advertised by conspicuous, warning coloration. I would like to have milkweed plants for Monarch butterflies. This is the reason Tropical milkweed (Asclepias curassavica), an introduced species native to Mexico, is developing a bad reputation among monarch biologists and conservation organizations.It can delay the butterflies' instinctual fall migration through North Texas to the point of destruction. Click to see full answer Also question is, which milkweed is bad for monarchs? It is Tall White Aster, Symphyotrichum lanceolatum , and the good news is, it is actually what the Monarchs need more at certain times of the year than Asclepias. What is the Xerces Society’s position on this milkweed species? It’s helpful to have a diverse selection of native milkweed and flowering plants, but avoid tropical milkweed (A. curassavica). A: What you have here is not a milkweed. When a bird or other predator tastes a monarch, it learns to associate this color pattern with the bad taste, and avoids preying on monarchs in the future. Since milkweed species have varying needs for sun, water and space, pay extra attention to growing requirements. Today's post is devoted to this new study. Monarch butterflies lay their eggs on just one type of plant, and that’s milkweed (genus Asclepias). Instead, the parasite infected migratory monarchs may have dropped out of the long journey for health reasons and instead of dying off, found a nice, cushy place to rest in the tropical milkweed. The most recent article about the monarch butterfly in the New York Times has once again raised the question of whether we should be planting non-native milkweed. In Southern California, gardeners have milkweed choices when outdoor plant shopping.For decades the most common milkweed species in our gardens has been a Central American species sometimes called Tropical Milkweed, or more correctly Asclepias currassivica.It is a magnet for monarchs and even a single plant in a garden will soon display a few colorful caterpillars dining on its leaves. Because tropical milkweed can live year-round in warm climates, monarchs may miss important environmental cues which normally trigger winter … Hello everyone, This week another bombshell study was published in the monarch world, this time about the effects of tropical milkweed (yes, that again). Tropical milkweed is not native to the U.S. but is sold by many plant nurseries and is frequently planted in gardens. While awareness is rising around the… Is tropical milkweed (Asclepias curassavica) bad for monarchs? 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