A sport of 'Krossa Regal' introduced by Wally Hoover of Loyal, Wisconsin.
H. 'Bullfrog' is a variegated sport of the classic, upright, bluish-gray-leaved 'Krossa Regal'. Leaf margin is bluish tissue of varying width, sometimes with narrow white streaks. Leaf center is non-definitive: predominately white tissue randomly (perhaps haphazardly) streaked with long, broad and narrow, mostly bluish tissue. In addition, leaves are strikingly twisted. Each leaf has its own variegation: its own personality.
Not a fast grower but grows well.
Smaller clump size than 'Krossa Regal'.