Answer: Hydrangea is easy to grow in rich, porous soil. They're fast growing and very forgiving if you make a mistake in pruning. The plants will grow in full sun to part shade. They'll bloom best if protected from hot afternoon sun. You can prune to control the size of the shrub by cutting it all the way down to the ground. Or, just cut out the stems that have flowered, leaving those that have not, and you'll have a number of nicely spaced flower clusters, and new stems the following year. The hydrangea with oval, gray-green leaves is H. arborescens (Smooth Hydrangea) and those with purplish leaves are H. quercifolia (Oakleaf Hydrangea).
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