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A deciduous shrub to 1.2m high with broadly oval, toothed dark green leaves. Dome-shaped clusters of white flowers with frilly pink or purple edges are produced in summer. Flower colors may vary depending on the pH of the soil
Grow in moist but well-drained, humus rich soil, ideally in light shade, though will tolerate full sun if soil is not too dry. Mulch in spring.
Acid soils (with a pH below 7) produce purple-to-blue blooms, with the brightest blue blooms resulting from the most-acidic soils. To coax your hydrangeas into producing blue blooms, you can amend your soil with sulfur, or mulch your plants with a pine and/or cedar needle mulch.
Alkaline soils (with a pH above 7) produce pink blooms. The more alakaline (or sweet) your soil is, the deeper pink your blooms will be. This can be achieved by adding lime around your planting area. It is, however, more difficult to turn hydrangea blooms pink because as a general rule, most plants struggle to be healthy in soils with a pH above 7.