Brunnera macrophylla 'Jack Frost'
Common Name: Siberian bugloss
Type: Herbaceous perennial
Family: Boraginaceae
Zone: 3 to 8
Height: 1.00 to 1.50 feet
Spread: 1.00 to 1.50 feet
Bloom Time: April to May
Bloom Description: Blue
Sun: Part shade
Water: Medium
Maintenance: Low
Suggested Use: Ground Cover, Naturalize
Flower: Showy
Leaf: Colorful
Tolerate: Rabbit


Easily grown in average, medium moisture, well-drained soil in part shade. Intolerant of dry soils. Prefers consistently moist, organically rich soils in shady areas. Clumps slowly spread by both creeping rhizomes to form thick ground covers.

Noteworthy Characteristics

Siberian bugloss is a rhizomatous, clump-forming perennial that is primarily grown for its attractive basal foliage. ‘Jack Frost’ leaves are a distinctive silvery white with green primary and secondary veins and a thin green rim around the leaf edges. The basal foliage forms a hosta-like mound of heart-shaped leaves (3-5” wide) which remain attractive throughout the growing season. Smaller stem leaves are elliptic. Tiny, forget-me-not-like flowers (light blue with yellow centers) in airy, branched paniculate cymes rise above the foliage on slender stems to 18” tall in spring. ‘Jack Frost’ is a sport of non-patented Brunnera marcrophylla ‘Langtrees’. Species is synonymous with and sometimes sold as Anchusa myosotidiflora. Bugloss comes from Greek meaning ox tongue in probably reference to the roughness and shape of the leaves. U. S. Plant Patent PP13,859 issued June 3, 2003.


No serious insect or disease problems. Slugs and snails are occasional visitors.

Garden Uses

Specimen, groups or mass as a ground cover. Borders, woodland gardens, naturalized areas or along streams or ponds.