Bee Balm (Monarda spp.) offers several purple cultivars that are great for attracting hummingbirds as well as pollinators, including ‘Pardon My Purple’ and ‘Purple Rooster.’ Bee Balm does well in moist, rich soils, but is prone to mildew, so you’ll want to select newer varieties that have been bred for resistance. Bee Balm has a pleasant, citrusy aroma and is hardy in Zones 3 – 9.