Pulmonaria 'Cotton Cool'Pulmonaria 'Cotton Cool'

Pulmonaria ‘Cotton Cool’


This plant is no longer for sale directly from TERRA NOVA® Nurseries. However, it may still be available through one of our Licensees or Retail Sources.


This long-blooming English introduction has attractive leaves that are entirely silvered. We looked at 'Majeste' and 'Cotton Cool' in our trials and of the two, 'Cotton Cool' never mildewed. Nice clusters of small blue flowers appear in April. A cool addition to shady areas but will take morning sun.

USDA Hardiness Zone(s): 4-9
Size (HT/W/FL HT): 12″ / 19″ / 14″
Exposure: Part Shade
Bloom Time(s): April, May

SKU: PULCOTCOO Categories: ,
Common Name Lungwort
Family Boraginaceae
Genus Pulmonaria
species --
Plant Type Perennial
US Patent # --
EU Patent # --
Bloom Time April, May
Flower Color Blue
Foliage Color Green, Silver
Dormancy Required
Exposure Part Shade
Growth Habit Clumping
Growth Rate Fast
Hardiness Zone 4, 5, 6, 7, 8, 9
How Different? Strap-like, completely pewter-silver leaves, smaller blue flowers, no mildew problems.
Landscape Value Contrast in the shade garden, mixed beds, under high branching shrubs.
Most Active Growing Season Spring, Winter
Persistence Deciduous
Size (HT/W/FL HT) 12" / 19" / 14"
Soil (Garden) Average
Water (Garden) Prefers average to moist soil in the garden.
Special Uses Deep South, Deer Resistant, Hummingbird Attractor, Winter Color
Comments Plants wilt rapidly from soil drying out when large and rooted out. Can be root pruned when grow too large for pot. Crown will re-root quickly. Pulmonaria prefer their roots cool.
Water (Greenhouse) Dry moderately between waterings.
EC 1.0 – 2.0
pH 5.6 – 6.8
Fertility Needs 150 – 200 ppm
Notes 8 week vernalization required for flowering, plant size. Transplant to 1-gallon pots late summer/early fall for full plants in late winter.
Finish Time to 4″ 5 – 7 weeks
Finish Time to Gallon
Day Length for Flowering Day Neutral
Pulmonaria 'Cotton Cool' - Product Profile
Pulmonaria 'Cotton Cool' - Growing Recipe

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