The Smooth Hydrangea 'Bella Anna' (PP21227, also known as 'PIIHA-1') is a pink-flowered cultivar of Hydrangea arborescens hybridized by Dirr and introduced in 2008. It produces large, rounded flower heads of a rich, deep pink that hold their color well. Like other smooth hydrangeas, it blooms on new wood, ensuring reliable flowering even in cold climates. It is a strong, upright grower.
| Family: | Hydrangeaceae (hy-drain-jee-AY-see-ee) |
| Genus: | Hydrangea (hy-DRAIN-juh) |
| Species: | arborescens (ar-bo-RES-senz) |
| Cultivar: | Bella Anna |
| Additional info: | (PP21227, aka PIIHA-1) |
| Hybridized by: | Dirr |
| Registered: | 2008 |
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