The Mountain Hydrangea 'Blue Billow' is a graceful lacecap cultivar of Hydrangea serrata. It produces large, flat flower heads with a ring of showy blue sterile florets surrounding a center of tiny fertile flowers. The foliage is a rich green and often develops reddish tones in fall. This cultivar is more cold-hardy than many bigleaf hydrangeas, making it a great choice for northern gardens.




| Family: | Hydrangeaceae (hy-drain-jee-AY-see-ee) |
| Genus: | Hydrangea (hy-DRAIN-juh) |
| Species: | serrata (sair-AY-tuh) |
| Cultivar: | Blue Billow |
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Mountain Hydrangea 'Little Geisha'
Mountain Hydrangea 'Komachi': Pretty Maiden of the Mountains
Mountain Hydrangea 'Golden Sunlight': Variegated Foliage and Delicate Lacecaps
Mountain Hydrangea 'Yae no Amache': Japanese Double Lacecap with Layered Beauty
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