Clean the pruners before using them. This will prevent the spread of disease. Use a solution of 10 percent bleach and the remainder water in a spray bottle. Spray the blades to sanitize.
Cut the stems back 3 to 6 inches to a growth node. These will be located just before a cluster of leaves. Cut the stem off 1/4 inch before the node. This light pruning promotes bushiness.
Prune the plant hard in early spring. Take the stems back to within 12 inches of the base of the plant in late winter and cover with straw or heavy mulch. Pull the covering away in spring so the new sprouts can be exposed to light and air.
Remove any broken or damaged stems at any time of the year. Follow proper pruning practices including sanitizing and cutting just before the node so the plant can produce a flush of growth from that node.
Cut off the poisonous berry clusters as they appear to protect children and pets. Begin maintenance of the berries at the end of summer and into fall as they grow.