We planted Silver Heart side-by-side with other silver leaved selections and noticed a huge difference in foliage toughness.  The leaves are thicker and more pubescent (or hairier) and they seem to hold up much better in extreme heat and humidity.  The blooms are still deep cobalt blue and the foliage is as silver as a baracuda's skin. Try this plant in your shade garden. We have it planted along my driveway in the shade and on warm summer evenings, each leaf looks like a little moon, lighting up the pathway.  The mature leaves are easily as big as your head!  This is one of the toughest brunneras we've ever seen. We promise it will brighten up any spot and give you months of enjoyment each year.