Hosta 'Mighty Mouse' is another in the increasing line of Hosta 'Blue Mouse Ears' sports. This little 7" tall x 1' wide charmer boasts round, blue-green leaves surrounded by a wide yellow border that ages to creamy white. In late spring, the clumps are topped with short spikes holding a paucity of dark lavender flowers. H. 'Mighty Mouse' is very similar to H. 'Frosted Mouse Ears', but the edge seems slightly more white to us.