Holly - Green Alaska An attractive addition to grow in containers or borders! This traditional holly tree variety, Green Alaska, has had its main stem pruned to form an attractive, formal standard shape, making it the perfect choice for growing in containers or mixed borders. It has deep glossy green foliage and clusters of shiny bright red berries. Supplied as a two-year-old plant, already up to 1m in height with a head diameter of around 20-30cm, it brings an instant display of stunning colour and structure with interest to the garden.