Buxus sempervirens, or box hedging, is an evergreen plant ideal for creating low hedges or borders. It can easily be trimmed to maintain whatever shape you like. These buxus 6 packs are great value at just £9.99 (£14.99 for XL).
Laurels also make great hedging plants, reaching a height of up to 5 metres. These ones are priced at £17.99 each.