Nepeta for rain gardens
Photo: Wikimedia Commons
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Nepeta

This mint produces billowing spikes of blue flowers, a nice contrast to the yellow-flowering plants nearby. Most mints reseed freely, so if you don't want new plants springing up, cut back spent blossoms promptly or plant a sterile kind, such as catmint (N. x faassenii). Blue flowers.

Zone: 3; Hardy everywhere

Height: up to 4 feet.

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