Although there are no plants with leaves that are a true blue, any large bush or tree with foliage that is a gray-blue or powder-blue will stop traffic.   The following plants are the bluest that we know of.

Eucalyptus macrocarpa  There are quite a few species of Eucalyptus with powder blue leaves, but most species  are blue when juvenile with rounded leaves and develop green, lance-shaped leaves when mature.  Eucalyptus macrocarpa has large, rounded leaves that remain blue.  Mature plants form sprawling shrubs 10’ tall by 20’ wide.  The 4” wide flowers are usually red and are followed by 2” wide, flying saucer-shaped seed capsules. 

Wichita Blue is the bluest Juniper and becomes a broad cone 12’ tall and 5’ wide.   It is a good blue-green with newer foliage that appears to be frosted. 

Blue Ice Arizona Cypress grows somewhat like the very common, column-shaped, Italian Cypress but is less dense, grows a bit wider, remains healthier under drought conditions, and  has that ‘ice blue’ color.  This is the “bluest” conifer that we have seen. 

Succulents  We carry many kinds of succulents with blue foliage including Agave (several), Aloe plicatilis, Crassula falcate, Echeveria pumila, Senecio repens and others.