PlantSowGrow
How to plant and care for Brunnera (Jack Frost)
Brunnera macrophylla 'Jack Frost'
🌸 Flower
🔁 Perennial
Heart-shaped leaves frosted with silver, and sprays of forget-me-not-blue flowers in spring. Lights up shady corners.
When to plant and care for it
JanFebMarAprMayJunJulAugSepOctNovDec
Flowers
Timed for a typical UK garden (last frost mid-April). The app uses your own town's frost dates.
Growing Brunnera (Jack Frost): what it needs
- Light
- Part shade · 6+ hours a day
- Watering
- Water well until established, then in dry spells
- Soil
- Moist, humus-rich soil
- Spacing
- 45 cm
- Height
- 40 cm
- In pots
- Grows well in containers
- Feeding
- A little general feed in spring
- Hardiness
- USDA zones 3–8
Step by step
- On planting day
Plant
Plant at the same depth as it was in its pot, 45 cm apart, and firm in.
- 0–1 days after “Plant”
Water In Well
Give a full can of water, then keep moist for the first few weeks while roots establish.
- 7–14 days after “Water In Well”
Mulch Around the Base
Spread 5 cm of compost or bark around the plant, keeping it off the stems.
Every year
- FebruaryCut Back Old Growth
Cut away the old, tatty leaves before new growth starts.
- AprilIn Flower
Tiny blue flowers over silver leaves.
More flowers to grow
Photo: Photo by David J. Stang / Wikimedia Commons (CC BY-SA 4.0)
