Dooley Hydrangea produces large mopheads of rich blue or pink, depending on soil pH. This is a vigorous growing, exceptionally cold hardy Big Leaf Hydrangea introduced by Dr. Michael Dirr. Hydrangeas are easy to grow deciduous shrubs that prefer partly shaded areas of the garden with a rich, moist but not wet, soil. Grows To: 4-6'H x 5-7'WUSDA Cold Hardiness Zones: 5,6,7,8,9Outdoor Light: Light shade, Part shade, AM sun, Part sun, *Full sunpH Range: Acidic, Mildly Acidic, Neutral, Mildly AlkalineSoil & Moisture: Moist, but not wet, moderately fertile, humus rich, well-drained soils.Do you know the many benefits of a proper organic mulch? Click here to learn more.Salt Tolerance: Moderate soil and aerosol salt toleranceDeer Resistance: Sometimes BotheredNative To / Origin: US Gardens - introduced by Dr. Michael Dirr, 1996, from the garden of Coach Vincent J. DooleyThis plant may be toxic to humans and/or animals, click here for details