Haas Halo Smooth Hydrangea

Scientific Name: Hydrangea arborescens ‘Haas Halo’

Order: Cornales

Family: Hydrangeaceae

Type: Shrub

Endangered Status: n/a

Number of Recorded Individuals at the Zoo: 50

Haas Halo smooth hydrangea, a selection of the species native to Illinois, has dense, upright blue-green foliage and white lace cap flowers that grow up to 14 inches in width. The flowers bloom in mid to late summer and dry out in the fall and persist on the stems, which provide cover for wildlife, until spring. This shrub cultivar prefers average, well-drained soil in full sun or partial shade and can be effective as a single specimen plant or in a large group. Due to its abundance of small, fuzzy, fertile flowers, this hydrangea is a favorite for bees and other pollinators.

Native Range
From cultivation; species native to eastern United States

USDA Hardiness Zone
4–9

Average Mature Height
4 feet

Flower Color
White and green

Flowering Months
July–September

Supports
Bees and small mammals