Blue star juniper | Juniperus squamata
This evergreen shrub grows in the wild in the mountainous regions of Afghanistan and China. They are either prostrate and sprawling or erect and bushy. Sometimes they even grow as small trees. The grey-green to silvery blue-green foliage is very decorative. Compact, slow-growing varieties such as the mound-forming ‘Blue Star’ with silvery foliage or the mat-forming ‘Blue Carpet’ with blue-green foliage are ideal for growing in containers. These undemanding, frost-resistant shrubs prefer a sunny position and will even tolerate prolonged periods of drought. They are therefore ideal plants for roof. They need a sandy , rich in humus and will even tolerate a chalky soil. Feed every 4 weeks with a conifer fertilizer. They can be propagated from semi-ripe cuttings taken in late summer. Fungal infections can lead to die-back. Yellow branches must be cut out immediately and burnt.