Colorful Taller Shrubs And Trees For Banks

In many California housing developments, roads are created on hillsides and pads bulldozed off for houses. Then the problem becomes how to cover steep banks with plants to hold the soil. In some case banks are steep and extensive. Ground covers often are not sufficient to hold the soil through heavy rains. What is needed is a mix of groundcovers cloaking the ground and deeper-rooted shrubs and trees to grip deeply into the subsoil. Here is a list of possible choices that was created by us for a housing scheme where the landscape was 30 years old and needed replanting with better replacements for plants and more drought-resistant plant choices than those planted by the developer.

Taller Shrubs: (8 to 12 feet tall, including one to 20 feet high.)

• Bottle Brush (Callistemon citrinus ‘Pink Perth’): 8 to 10 feet tall, 5 to 8 feet wide. Weeping foliage, pink flowers in spring. Use low on banks as big, colorful screen.
• Bottle Brush (Callistemon citrinus ‘Splendens’ and C. citrinus ‘Improved’):
• Massive shrub, 10 to 15 feet tall and wide. Use low on banks as big, colorful screen. Brings birds.
• New Zealand Christmas Shrub (Metrosideros collina ‘Spring Fire’): 8 to 12-feet high, 6 to 10-feet wide. Gray-green foliage with a profusion of showy flowers in late spring to early summer bringing butterflies and birds. Makes attractive hedge, but is sensitive to frost. Use high on banks, thus safe from frost.
• Weeping Bottle Brush, (largest shrub form) (Callistemon viminalis ‘McCaskillii’): 20 feet tall, 15 to 20 feet wide. Flowers bring mockingbirds, orioles, and flocks of hummingbirds for their nectar.  Improved varieties, such as this one, tend to be thickly bushy with brightly colorful flowers. Drought-resistant once established but adapted to garden water.