Hydrangea arborescens 'Strong Annabelle' is a vigorous and popular cultivar of the smooth Hydrangea, prized for its enormous, long-lasting flower heads. This deciduous shrub features large, rounded flower heads that emerge lime green and mature to a bright white, often reaching up to 30cm (12 inches) in diameter. Compared to the classic 'Annabelle', 'Strong Annabelle' boasts sturdy stems that don't flop under the weight of the blooms. It's a fantastic choice for borders, cottage gardens, and even as a cut flower, providing a dramatic display of summer colour. It belongs to the Hydrangeaceae family.
Origin: Hydrangea arborescens is native to the eastern United States. 'Strong Annabelle' is a cultivar developed for its improved stem strength and larger flower heads.
Light: Hydrangea arborescens 'Strong Annabelle' thrives in partial shade to full sun. It prefers a location with morning sun and afternoon shade, especially in hotter climates.
Water: Water regularly, especially during dry periods. Hydrangeas prefer consistently moist, well-drained soil. Avoid overwatering, which can lead to root rot.
Soil: Hydrangea arborescens 'Strong Annabelle' prefers fertile, well-drained soil that is rich in organic matter. It can tolerate a range of soil pH, but prefers slightly acidic to neutral conditions.
Fertilising: Feed your Hydrangea arborescens 'Strong Annabelle' with a slow-release fertiliser for flowering shrubs in spring.
Pruning: Prune your Hydrangea arborescens 'Strong Annabelle' in late winter or early spring. You can cut back the previous year's stems to about 15-20cm (6-8 inches) from the ground to encourage new growth and larger flower heads.
Pests and Diseases: Keep an eye out for common pests such as aphids and spider mites. Powdery mildew can also be a problem in humid conditions.
Uses: Hydrangea arborescens 'Strong Annabelle' is primarily grown as an ornamental shrub for its showy flower heads. It's a popular choice for borders, cottage gardens, and as a cut flower for bouquets and arrangements.
Toxicity: Hydrangeas contain cyanogenic glycosides, which can be toxic if ingested in large quantities. It's best to keep them away from children and pets.