Ilex × meserveae 'Alaska' – Blue Holly
Bold, beautiful, and reliably hardy, Ilex × meserveae 'Alaska' is one of the finest of the blue hollies — a group of hybrids renowned for their exceptional cold-hardiness and outstanding ornamental presence. 'Alaska' is a female cultivar that bears dense clusters of vivid red berries from autumn through winter, provided a compatible male pollinator is growing nearby. These jewel-bright berries stand out brilliantly against the plant's distinctively dark, glossy blue-green foliage, making it one of the most eye-catching hollies available for the garden.
The leaves are spiny-edged and richly coloured, with a deep, almost metallic sheen that gives the plant its characteristic 'blue holly' quality. In spring, small white flowers appear among the foliage, attracting early pollinators before the plant settles into its role as a handsome evergreen backdrop through summer. Come autumn and winter, the berry display takes centre stage, providing colour and food for wildlife at the garden's quietest time of year.
'Alaska' forms a dense, upright to broadly pyramidal shrub with a naturally tidy habit, making it well suited to use as a specimen, as part of a mixed evergreen border, or clipped into a structured hedge or screen. It is exceptionally hardy — more so than many other hollies — and performs reliably even in exposed or colder gardens where less robust varieties may struggle.
Growing conditions
Position: Ilex × meserveae 'Alaska' thrives in full sun to partial shade. A sunnier position will encourage the most prolific berry production, though the plant adapts well to shadier spots and retains its rich foliage colour across a range of aspects. It is tolerant of exposed and windy sites, making it a dependable choice for challenging garden positions.
Soil: Best grown in moist, well-drained, slightly acidic to neutral soil. It adapts to most fertile garden soils but dislikes prolonged waterlogging. Incorporating organic matter at planting will help establish a strong root system, particularly on heavier soils. Once established, 'Alaska' is reasonably drought-tolerant.
Pollination: As a female cultivar, 'Alaska' requires a compatible male blue holly — such as Ilex × meserveae 'Blue Prince' — growing in reasonable proximity to set its berries. Without a nearby male, flowering will occur but berry production will be poor or absent.
Care
Watering: Water regularly during the first growing season to help the plant establish. Once settled in, 'Alaska' is largely self-sufficient, though it benefits from additional watering during prolonged dry spells, particularly when grown in free-draining soils.
Feeding: An application of a balanced or ericaceous fertiliser in early spring supports healthy growth and encourages a good berry crop. Mulching around the base annually with well-rotted compost or bark helps retain moisture, suppress weeds, and maintain the slightly acidic soil conditions the plant prefers.
Pruning: 'Alaska' has a naturally well-shaped, compact habit and requires very little pruning to maintain its form. If shaping or size reduction is needed, prune in late winter or early spring before new growth begins, or lightly after flowering. Avoid heavy cutting in autumn, which may reduce the following season's berry display. When used as a hedge, trim once or twice a year to keep a neat outline.
Wildlife value: The berries are an important food source for birds — including thrushes and fieldfares — through the colder months. The spring flowers provide early nectar for bees and other beneficial insects. Please note that the berries, while invaluable to wildlife, are toxic to humans and pets if ingested.
