Agastache 'Red Happiness' (Hummingbird Mint) has such beautifully colored red flowers, you just have to smile when you see them. Discovered by HCG founder David Salman, it’s a very cold hardy hummingbird mint that’s long blooming with nectar-rich flowers that are a favorite of the hummingbirds. The plant is deer and rabbit resistant with its strongly mint-scented foliage. If planted in zone 5 or 6 in fall, it should not be cut back. Mulch heavily to protect it from winter cold and wet conditions.