Ulex europaeus aka Common Gorse

Ulex europaeus, or common gorse, is an evergreen shrub. It belongs to the pea family, Fabaceae. Its native range covers western and central Europe, including Britain and Ireland. It grows on heaths, moors, and open common land. It favours dry ground and often forms dense, thorny thickets. Introduced plants have spread far beyond Europe. Gorse is invasive in parts of North America, Australia, and New Zealand.

In gardens, it reaches 5–8 feet [1.5–2.5 metres] tall and wide. Some plants reach 10 feet [3 metres]. Introduced plants in New Zealand can reach 23 feet [7 metres]. The shrub grows fast, with many stiff, green, angled branches. Each twig ends in a sharp spine. Small, narrow leaves range from dark green to grey-green. They feel stiff and sharp, much like thorns. Older bark has shallow grooves and scales, with grey to orange-brown tones. Older shrubs may lose growth around their base.

Bright yellow, pea-shaped flowers have a scent like coconut. The main display comes in winter and spring. Some plants also bloom in autumn, or throughout the year. Bees, flies, and beetles visit the flowers. Slender pods follow, turning dark brown or black as they ripen. Hairs cover the pods before they split. Ripe pods burst open and throw seeds away from the parent. Seeds may travel up to 15 feet [4.6 metres].

Gorse grows best in full sun and poor, sandy soil. It needs good drainage and accepts acid or neutral ground. Rich soil can lead to long, sparse growth. It tolerates drought and exposed coastal sites. RHS rates it H6; PFAF lists USDA zones 5–9. Oregon State gives zone 6 as its cold limit. Severe winters can damage plants, though they often recover. RHS reports few pest problems. Honey fungus may affect it, but the degree of risk remains unclear.

Gorse serves as a hedge, windbreak, and wildlife plant. Its thorns make a dense barrier. Roots help hold sandy banks and other poor ground. It fixes nitrogen and can help woodland trees become established. Flowers yield yellow or orange dye. Its spread can cause problems outside its native range. PFAF records pickled flower buds and tea from shoot tips. It gives the plant a low food-use rating. The supplied sources report no known hazards, but offer no specific pet-safety evidence. They also record historical medicinal uses, rather than proven treatments.