Hydrangea arguta, commonly known as Himalayan Hydrangea or Rough-leaved Hydrangea, is a deciduous shrub native to the Hawaiian Islands. It exhibits a moderate growth rate, reaching heights and widths of 6-9 feet (1.8-2.7 meters). The shrub is characterized by its rough-textured leaves and large, lacecap flower heads that are predominantly white and bloom in early to mid-summer. These flowers are considered highly ornamental and can add a delicate texture to garden settings.

Himalayan Hydrangea is valued for its showy flowers and its ability to thrive in shadier conditions, making it a popular choice for woodland gardens, shaded borders, and as an understory plant. It is also suitable for planting in areas with dappled sunlight. Gardeners should provide it with well-drained, moist soil rich in organic matter, and ensure consistent watering, especially during dry periods. While it is adaptable to both loam and clay soils, it prefers a slightly acidic to neutral pH. This species is generally disease-resistant but can be susceptible to pests such as aphids and mites, as well as fungal issues in overly humid conditions. Pruning immediately after flowering can help maintain its shape and promote vigorous growth.CC BY-SA 4.0