Common Holly

Description

Common holly (Ilex aquifolium), also known as European holly or Christmas holly, is a familiar evergreen shrub found across the UK, particularly in dark, shady woodland settings. Its dense evergreen foliage provides valuable shelter for birds and a cosy place for hedgehogs to hibernate.

Holly is especially loved for its glossy dark green leaves and bright red berries, which add welcome colour through the winter months. These berries are only produced by female plants and, while an important winter food source for birds, they are toxic to humans, pets, and grazing animals.

Loved for its use in Christmas decorations, Ilex aquifolium has long been gathered for wreaths, garlands and festive displays. If you plan to cut a few stems, do so in early to mid-December and place them in a bucket of water in a cool spot to keep them fresh. Otherwise, the berries are often quickly enjoyed by birds. Putting out alternative bird food at this time helps ensure wildlife is still well supported while you enjoy a little festive greenery indoors.

How to Identify

Holly leaves are dark green, glossy, and oval. Younger plants usually have sharply spiny leaves, while older trees often have smoother-edged leaves, particularly higher up the plant.

Common holly is dioecious, meaning male and female flowers grow on separate plants. The small white flowers, each with four petals, appear from spring into early summer. Once pollinated by insects, female plants produce scarlet-red berries that can remain on the branches throughout winter.

How to Grow

Ilex aquifolium grows well in most soil types but prefers moist, slightly acidic soils. It is slow-growing, with a typical growth rate of 10–15 cm per year, and performs best in full shade to partial shade. Holly is also hardy and can tolerate exposed and coastal conditions.

It makes an excellent decorative hedge and works particularly well in mixed native evergreen hedging, providing structure and colour when much of the garden is bare.