Milkweeds, as most know, are the host plant for Monarch Butterflies. A host plant is another way of saying caterpillar food plant.
Monarchs deposit eggs on milkweed plants. Some milkweeds are more productive than other species. For the Northeast region, the most productive milkweed is Common Milkweed (Asclepias syriaca). The second most productive is Marsh Milkweed (Asclepias incarnata), also known as Swamp Milkweed.
What is meant by productive? When given a choice, the females choose these plants over other species of milkweed and the caterpillars have the greatest success rate. In our own butterfly garden and at at my client’s habitat gardens, I grow both Common and Marsh side-by-side. The females flit from one plant to the next, freely depositing eggs on both species.
Monarch caterpillar readying to pupate (become a chrysalis) and hanging in a J-shape
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