Expect up to 8 weeks of dazzling summer bloom from pure white spires held upright on strong branches. This new Dirr hybrid is more compact than most Hydrangea paniculata varieties but just as rugged, and its dark green leaves have a leathery texture resistant to insects and disease. 'HYPMAD I' PP 19,082

Hydrangea is a valuable genus of some 100 species of shrubs and vines grown for their large and very showy flower heads. Hydrangeas are at their best in summer and fall -- quiet time for most woody plants -- and are worth having for that reason alone. For information on Hydrangea care, click on Growing Guide.