Hydrangea macrophylla, colloquially referred to as bigleaf hydrangeas are the most common.
Mophead hydrangeas prefer shade although not full-time shade. Too much shade will reduce flowering. These plants are highly sensitive to drought so it is important to keep them watered regularly. Most fascinating is that you can change the colour of the blooms produced by altering the acidity of your soil. Neutral or highly alkaline soils will produce pink flowers while acidic soil will produce blue flowers.
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