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Hydrangea macrophlla or bigleaf hydrangea can produce ball-shaped flower clusters ("Mopheads") or flat clusters of small flowers surrounded by a ring of more prominent flowers ("Lacecaps"). Colors range from blue to pink flowers, depending on the soil's acidity. Blue flowers develop with acidic soil (a pH of 5.0 to 5.5) and pink flowers from alkaline soil pH (6.0 to 6.5). Aluminum sulfate can be added to acidify the soil, and lime to produce a more alkaline soil. Bigleaf hydrangea is tolerant of both clay and sandy soil, and is susceptible to damage by deer.

Hydrangea macrophylla, Bigleaf Hydrangea

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