Brunnera macrophylla 'Jack Frost,' commonly known as Siberian Bugloss or Heartleaf Alkanet, provides a lush perennial ground cover for shady gardens, spreading slowly from year to year. Forget-me-not-like flower spikes top the clump-forming, green-veined silvery foliage in spring, making this a great plant for containers, along ponds and other water features, in borders, or woodland gardens.