How to care for Siberian Bugloss (Brunnera macrophylla)

Brunnera macrophylla Jack Frost

Siberian Bugloss, Heartleaf Bugloss, False Forget-Me-Not

The spring blooming Siberian Bugloss (Brunnera macrophylla) is closely related to the Forget-Me-Nots. From this member of the borage family blue and white flowering cultivars as well as some with coloured leaves are available.

Plant care

Siberian Bugloss

Light requirements

Part shade to shade. If the ground is evenly moist, a little bit of morning or evening sun is welcome. Varieties with thick leaves tolerate more sun than the thin-leaved ones. But too much sunlight can scorch the leaves.

Siberian Bugloss grows good under trees and shrubs.

Brunnera macrophylla Jack Frost
With its silvery green veined leaves Brunnera macrophylla “Jack Frost” is is probably the most popular variety.

Soil requirements

Brunnera macrophylla prefers rich in humus to sandy-clayey soil.

Brunnera macrophylla Jack Frost

Moisture requirements

The soil should be evenly moist but not soggy.

Brunnera macrophylla Looking Glas
Brunnera macrophylla “Looking Glas”

Hardiness zone

Z 3 (-35 °C / -31 °F)

Brunnera macrophylla Looking Glas

Quick facts

Life Cycle


Brunnera macrophylla Silver Heart
Brunnera macrophylla “Silver Heart” has leathery leaves and tolerates some morning or evening sun.


Borage Family (Boraginaceae)

Brunnera macrophylla Silver Heart


12 to 27 inches depending on the variety

Flowering time



No but not edible.

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