Answer: Hibiscus paramutabilis x syriacus 'Red Sentinal' is a cross between H. mutabilis (Confederate Rose) and H. syriacus (Rose of Sharon). This plant was bred for heat and drought tolerance, and frost hardiness. You may be overwatering. While it is normal to want to water a plant that looks wilted, doing so may actually be harming the plant. Over saturated soils can be void of oxygen; this can cause root rot. Hydrangeas react to hot summer sunshine in the same way - the leaves wilt. But, as long as they recover overnight and look fine the next morning, there's no need to water. If the foliage still looks wilted in the morning, it's time to water deeply. Believe it or not, your plant will adjust to its site in your landscape. Simply water it deeply once each week and hold off on fertilizer until next spring. (You can check how efficiently you're watering by digging a hole near the roots 3-4 days after watering deeply. If the soil is moist 3 inches beneath the surface, you won't need to water for a few more days; if it's dry, it's time to water. When you do water, apply slowly so it trickles down and wets the soil at least 8 inches deep.)
Best wishes with your plant!
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