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Photo: Shutterstock/Jason Patrick Ross
Milkweed (Asclepias tuberosa)
If you choose just one, pick the vibrant orange butterfly weed, which is in the milkweed family and essential to monarchs for laying eggs, providing leaves for caterpillars to eat and nectar for butterflies to drink. "Butterflies flock to it," said Diboll. "It’s a real show-off plant." There are close to a dozen kinds of milkweed, such as red or swamp milkweed, to fit a variety of soil conditions or offer different colored blooms. Diboll advises avoiding common milkweed, which can take over a garden and is best for expansive meadows.