Hydrangeas do best in partial shade (and may burn if receiving high heat or light intensity, and/or having heat and excess light reflected off a wall or fence) in your area, and they require regular water, but with good draining soil. Ground soils in your area tend to be high in clay content which holds lots of water but does not drain well. If you did not amend the soil well by mixing in organic matter, or the hole around the root zone is hard-packed, plants may begin to wilt in response to too much water. We recommend you dig up a handful of soil to check for moisture, or use a moisture meter (can be purchased at your local garden center). Also make sure that mulch is not in contact with the plant stem; mulch should be kept 3-4 inches away from the stem of the plant to avoid stem/crown rot issues. These plants also perform better in acidic soil conditions, which are not likely in your area. We recommend you fertilize with an acid fertilizer when the plants recover from the current condition(s).
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