Annabelle Smooth Hydrangea

Hydrangea arborescens 'Annabelle'

flower

Annabelle is the beloved snowball hydrangea, a selection of the eastern North American native smooth hydrangea that produces some of the largest flower heads of any hardy shrub. It is a rounded, deciduous shrub 3 to 5 ft tall and wide that bears huge, symmetrical, rounded heads of pure white sterile flowers up to a foot across, opening in early summer and lasting about two months, with the heads drying to soft green and tan into fall. Because it blooms on new wood it flowers reliably every year even in cold climates, and as a native it is at home in woodland-edge and shade gardens.

✅ Plant alongside

Good neighbors that attract beneficial insects or deter pests

• Hosta — The classic shade-garden partner whose bold leaves fill the ground beneath the white blooms
• Astilbe — Feathery plumes that enjoy the same moist part shade and bloom alongside it
• Sweet Woodruff — A low woodland groundcover for the moist shade at the base of the shrub

🛡️ Pest & disease prevention

Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide

• Aphids →

  Rinse colonies off soft new growth with water; rarely serious on an established shrub

• Powdery mildew →

  Give the shrub room for air to move and avoid wetting the leaves late in the day

• Leaf spot →

  Clear fallen leaves in autumn and water at the base rather than overhead

🌸 Blooms & cutting

Annabelle is a wonderful cut and dried flower. For fresh use, cut the big heads once they are fully open and firm, early in the cool morning, and condition them in deep water. For dried everlasting heads, let the flowers age on the shrub until they turn papery green or tan, then cut and air-dry them. The slender stems can flop under the weight of the wet heads after rain, so cutting some for the vase also relieves the plant; leave the rest for winter interest and prune at the late-winter renewal.

🥗 Nutrition & benefits

Grown as an ornamental and a classic cut and dried flower, and valuable as one of the few hydrangeas native to North America. The heads are mostly showy sterile florets, but bees visit the smaller fertile flowers, and the big heads dry for long-lasting arrangements.

⚠️ Toxicity & safety

Like all hydrangeas, the leaves, flower buds, and stems contain cyanogenic glycosides and are considered toxic if eaten. They are mainly a concern for dogs, cats, and horses (causing drooling, vomiting, and diarrhea) and would only affect a person who ate a large quantity. The plant is safe to handle and grow around; just keep pets and small children from chewing the foliage or flowers.