Viburnum opulus (Cramp Bark) 9 cm Pot

Growth habit & appearance: Viburnum opulus forms a rounded, multi-stemmed shrub with maple-like leaves that turn vivid red and gold in autumn. In late spring it produces flattened white flower clusters that support pollinators, followed by bright translucent red berries that offer significant ecological value for birds. Its arching stems and seasonal colour make it a standout native hedge and woodland-margin species in Ireland. Mature plants can reach around 2 m and develop a dense, wildlife-friendly structure.

Growing conditions: Seed harvested from the Ivywood woodland and propagated in our nursery. A fully hardy perennial shrub native to Ireland and Europe, Cramp Bark thrives in full sun to partial shade and adapts well to damp soils, woodland edges, and hedgerow conditions. It tolerates wind, cold, and periodic waterlogging, making it highly reliable across Irish gardens. Once established, it forms a durable, low-maintenance shrub that supports biodiversity throughout the seasons.

Traditional & herbal uses: Traditionally valued for menstrual disorders, cramping, and pelvic congestion, Viburnum opulus remains widely used in modern herbal practice. Peer-reviewed research highlights its spasmolytic effects on smooth muscle, attributed to coumarins, salicylates, and valerenic-type constituents. Contemporary practitioners use Cramp Bark for dysmenorrhoea, endometriosis-related tension, irritable uterus patterns, menopausal pelvic cramping, and muscular spasms in the back and neck. Several studies also note mild hypotensive and vasodilatory actions, aligning with its traditional use in circulatory tension and elevated blood pressure. As an ecological species, it provides food, shelter, and pollen resources across multiple trophic levels.

Maintenance & harvesting: Plant out into its final position and prune in late winter to maintain a compact, bushy habit. Harvest bark from 2–3-year-old stems during dormancy, taking care to remove only small sections to avoid damaging the shrub. Mulching in spring helps retain soil moisture, particularly in lighter soils. Once established, it is largely self-sufficient and requires only periodic shaping.