Position
Sun to part shade






Hydrangeaceae
VAT included · plus
Deciduous shrub
Position
Sun to part shade
Moisture
Moist
Drainage
Free-draining
Hardiness
Fully hardy · -20°C
Mature size
100–150 × 100–150 cm
Winter habit
Deciduous
Bloom time
Summer, Autumn
Containers
Good in pots
Pruning
Late winter, Early spring
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Hydrangea arborescens 'Strong Annabelle' is a white-flowering smooth hydrangea selected for big, rounded flower heads held on sturdier stems. Supplied as a set of 2 plants, it’s an easy way to build a fuller shrub presence quickly - large blooms from mid-summer into early autumn, with a neat, deciduous framework the rest of the year.
It flowers on new growth, which makes pruning simple and reliable. The trade-off is moisture: a steady root zone matters most in summer, because drought stress quickly dulls leaf quality and shortens flowering. Good drainage still counts in winter, but repeated dry-downs in summer are what usually make growth uneven and flowerheads smaller.
Plant into a wide, improved area and water in thoroughly. Mulch helps keep moisture even, especially on lighter soils. In the first season, deep watering during dry spells is what sets the shrub up for strong flowering later.
Because it flowers on new wood, pruning happens in late winter to early spring. A harder cut (shorter framework) pushes fewer, larger flower heads. A lighter prune leaves more stems and usually gives more - but smaller - blooms with a fuller shrub outline.
Hydrangea arborescens 'Strong Annabelle' is the dependable “big white hydrangea” look with less fuss about pruning - keep the root zone evenly moist in summer and it performs reliably. For a fuller look, repeat shrubs in a drift and give each plant enough space for airflow. Crowding can trap moisture and encourage leaf spotting. Because it flowers on new wood, it can be cut back hard in late winter without sacrificing bloom.
Woodland edges, ravines and moist slopes of eastern North America.