When pruning, leave a little stub attached to the main branch so the cut can heal or callous properly (figure B). Of course, you would normally trim dogwoods and other spring flowering trees and shrubs after they've bloomed in the spring, but since water sprouts like these rarely have any flower buds on them anyway, James suggests getting rid of them while the tree is dormant.Another dogwood in James' yard that needs pruning is a red-twigged shrub known as Cornus alba 'Argenteo-marginata'. This is an excellent shrub that is hardy to Zone 2 and produces gorgeous variegated green and white foliage. The red stems provide winter interest, but the red wood is most vivid on new growth (figure C). While dormant, James prunes the stems back to almost ground level (figure D). "It looks drastic, but these plants will bounce back in no time."
The same goes for this yellow-twigged dogwood known as Cornus sericea. It too benefits from this radical pruning every year (or at least every other year), just before it breaks dormancy in late winter (figure E).
Another type of odd branch growth is as harmful as it is unsightly. Suckers are branches that emanate from the base of various trees and shrubs, and they often suck energy from the plant. "Now, some plants are more notorious than others for producing suckers," says James, "but one of the worst culprits in my landscape is Philadelphus or mockorange." The plant is hardy to Zone 5 and grows to about eight feet tall.