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. Please contact our sales department for more information at 800-215-9450.

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

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SKU: PULCOTCOO Categories: ,
Common Name Lungwort
Family Boraginaceae
Genus Pulmonaria
species hybrid
Plant Type Perennial
Persistence Deciduous
US Patent # --
EU Patent # --
Hardiness Zone 4, 5, 6, 7, 8, 9
Growth Habit Clumping
Size (HT/W/FL HT) 12" / 19" / 14"
Finish Time Fast (4-6 Weeks)
Bloom Time April, May
Growth Rate Fast
Most Active Growing Season Spring, Winter
Flowering Season Spring, Winter
Flower Color Blue
Leaf Color Green, Silver
Soil Average
pH 5.6 - 6.8
Exposure Part Shade
Special Uses Deep South, Deer Resistant, Hummingbird Attractor, Winter Color
Nutritional Needs 150 - 200 ppm
Dormancy Required
Water (Greenhouse) Dry moderately between waterings.
Water (Garden) Prefers average to moist soil in the garden.
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.
Finish Time to 4" 6 weeks
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.
Grower Notes 8 week vernalization required for flowering, plant size. Transplant to 1-gallon pots late summer/early fall for full plants in late winter.
Pulmonaria 'Cotton Cool' - Product Profile
Pulmonaria 'Cotton Cool' - Growing Recipe

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