Leopard’s bane is a perennial which originated in and has been growing in gardens for hundreds of years.  ‘Little Leo’ grows 9- to 12-inches tall and produces semi-double yellow daisylike flowers from March through June and 6-to 8-inch long heart-shaped leaves.  They are easy to grow in full sun or partial shade and prefer cool conditions—they go dormant during the warmth and humidity of our summers