| Description | 'Hass Halo' Hydrangea (Hydrangea arborescens) is a medium to large shrub reaching seven by 7 feet. It has sizeable lacecap flower heads that are good pollinators. Cutting back in the spring will reduce the size. |
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| Pronunciation | (high-DRAN-gee-a)(ar-bo-RES-enz) |
| Plant Type | Shrubs Deciduous |
| Hardiness Zone | 4-7 |
| Sunlight | best with some shade |
| Moisture | prefers moist, tolerant of average. |
| Soil & Site | average |
| Flowers | oversized white lacecap flower heads, a good pollinator, outer showy white florets are sterile while the small greenish inner florets are fertile. dried flower heads provide late-season interest |
| Fruit | dehiscent seed capsules |
| Leaves | blue green, deciduous |
| Dimensions | can reach 7 by 7 feet, kept smaller by hard pruning in the early spring or fall |
| Maintenance | cut flush with the ground in the late fall or early spring to control the height |
| Cultivar Origin | seedling selected by Frederick Ray, plantsman and horticulture professor, from the Pennsylvania garden of Joan Haas |
| Notes & Reference | #238-Mt Cuba Center (www.mtcubacenter.org), NC State Extension |
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