Brunnera 'Silver Heart'Give shady spots in your garden a makeover with 'Silver Heart' brunnera. Commonly called forget-me-not, this silver-leaf beauty has huge, thick, dark green leaves with glistening silver overlay. And if that's not enough, 'Silver Heart' reliably sends up spikes of deep blue flowers every spring. Unlike older forms of brunnera, 'Silver Heart' isn't afraid of heat and humidity. Just be sure to plant it in moist, well-drained soil and it will do fine.