Hydrangea arborescens Flowerwow 4.5 Litre Pot

A showstopping cultivar of the North American native smooth hydrangea, Hydrangea arborescens 'Flowerwow' delivers enormous, dome-shaped flower heads packed with sterile florets that open a fresh lime-green before transitioning to pure white, then ageing gracefully to soft antique green as the season progresses. Reliably free-flowering and vigorous, this deciduous shrub brings months of interest to borders, cottage gardens and contemporary plantings alike, and performs beautifully as a cut or dried flower.

Habit and appearance

A rounded, bushy deciduous shrub with strong, upright stems that support its impressively large blooms without flopping. The broad, mid-green leaves provide a lush backdrop throughout the growing season, while the long-lasting flower heads — among the largest produced by any smooth hydrangea — create a striking focal point from midsummer well into autumn. Even after the flowers have dried on the plant they retain ornamental value, adding structure to the winter garden.

Growing conditions

Best planted in a position that receives full sun to partial shade. Unlike many hydrangeas, 'Flowerwow' is remarkably adaptable and tolerates a wider range of exposures, though afternoon shade in very hot climates helps prevent wilting. It thrives in moist, humus-rich, free-draining soil and benefits from generous organic matter worked into the planting hole. Consistent moisture is appreciated during establishment and throughout the growing season, particularly during dry spells. This is a notably cold-hardy and tough plant, well suited to a broad range of temperate climates.

Care

Water regularly, especially in the first season after planting, to encourage a strong and deep root system. Apply a balanced slow-release fertiliser in early spring and top-dress around the base with well-rotted compost or bark mulch to retain moisture and suppress weeds. Unlike mophead hydrangeas, H. arborescens flowers on new wood, making it straightforward to prune. Cut all stems back hard to around 30 cm above ground level in late winter or early spring before new growth begins; this encourages vigorous new shoots and the largest possible flower heads. Deadheading is optional — leaving the spent blooms on through winter provides attractive structure and some frost protection for emerging buds.