Jack Frost is a classic shade perennial with heart-shaped leaves so heavily frosted in silver that only the green veins show through, giving a crackled look. In mid to late spring, clusters of tiny baby blue flowers like forget-me-nots float above the shimmering foliage.
It forms a neat mound about a foot tall and handles heat better than older brunneras. It is lovely as a groundcover, in containers or in spring bouquets, and it holds an Award of Garden Merit. Deer tend to avoid it.
What it looks like
Airy sprays of tiny five-petaled flowers about a quarter inch across in baby blue with small yellow-white eyes, held several inches above the leaves on thin stems. Leaves are heart-shaped, 4 to 6 inches across, heavily overlaid with silver-white so that only a fine network of green veins and a thin green edge show, giving a crackled, frosted look. The plant is a neat, rounded mound 12 to 15 inches tall and wide. At peak bloom a haze of blue flowers hovers over the silver leaves.
Growing it with lavender
Brunnera needs shade and evenly moist soil, so it belongs in a shade garden with hostas and ferns rather than in a sunny lavender bed.
Care
Plant in part to full shade in humus-rich soil that stays evenly moist; protect from hot afternoon sun, which can scorch the leaves. Hardy in USDA zones 3-8. Remove spent flower stems after bloom and trim tattered leaves as needed; it rarely needs dividing.
At a glance
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Botanical name: Brunnera macrophylla
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Flower color: Baby blue
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Foliage: Silver with green veins
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Growth habit: Neat, rounded mound
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Mature size: 12–15 in tall × 12–15 in wide
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USDA hardiness zones: 3–8
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Light: part sun to part shade, full shade
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Bloom start: Early-May
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Peak bloom: Mid-May
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Bloom pattern: Single Flush
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Deer resistance: Resistant
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Pollinator value: Fair
Sizes and shipping
One full 20-cell plug tray: 20 large, field-ready plugs of this variety (cells about 2¾ in. wide × 3¼ in. deep or deeper), ready to plant out or pot up. Potted plants and plug trays ship during our live-plant seasons, March 1–May 31 and October 1–November 30; June through September is local pickup only. Plugs, potted plants and trays do not ship to AZ, CA, HI, ID, NV, OR, UT or WA.