Creeping juniper | Juniperus horizontalis
These evergreen plants with their characteristic mat-forming habit are native to North America. Many varieties such as ‘Bar Harbor’ have bluish green foliage that turns reddish-purple in autumn. Some of them make a spread of some 2 m (6 ft 6 in) but only grow 50 cm (20 in) high. The ‘winter Blue’ variety is less spreading than others. Slow-growing varieties of J. sinensis such as ‘Old Gold’ for instance, are also suitable for growing in containers. They also look good in combination with heathers, planted together in large containers. These frost-resistant shrubs prefer a sunny position and will even tolerate periods of drought. They will even grow in poor, which should be acid rather than limy. Feed occasionally with a special conifer fertilizer. Juniper can be propagated from semi-ripe cuttings taken in late summer. The leaves can cause skin allergies.