Most hydrangeas do not like the full sun; they need a few hours of direct sunlight a day; the rest of the time, they prefer to be in the shade. To prevent wilting in the first place, cut or select only hydrangeas that are fully open. It’s not uncommon to find them suddenly tired and wilting, as if they’re on death’s doorstep. Your hydrangeas may even seem to shrink from one year to the next. For real. The bouquet of white hydrangeas Ryan brought home lasted for just over two weeks when watered this way. Bigleaf hydrangeas are suitable for U.S. Department of Agriculture plant hardiness zones 5 through 11. A temperature between 65 and 75 degrees Fahrenheit is ideal, with temperatures that do not fall below 50 degrees Fahrenheit at night. We have 14 plants, and this year several plants have suddenly developed wilting stem and died. An exception to the rule of “no need to cover hydrangeas… No plants in ground since last year should need supplemental watering in those conditions. To be honest, I have never used it for anything but flowers haha. Water your hydrangea less if the soil is soaking wet. Looking at weather.com for Springfield, MO, looks like there's already more rain than in all of June, on average. Here’s how to revive wilted hydrangeas and get them looking great again! However, not everyone has the opportunity to … Q • I have for several years had beautiful hydrangea blooms from several different varieties. Hydrangeas do not like wet feet and irreversible rot can occur if it is watered too much. 4. Make sure you know the best everyday care of hydrangeas. Hydrangeas tend to become especially stressed in hot sunny conditions, they perform best in morning sun or partially shady areas. If the blooms start to wilt, shock them back by dunking the whole flower head in warm water for a few minutes. Alum is a spice that I believe is used for pickling or the like. So, unless one lives in a very cold climate, hydrangeas do not need to be covered when normal winter temperatures are experienced. The most comfortable temperature for these plants is 70 ° F (21 ° C). If the hydrangea is subjected to extreme heat, the foliage begins to wilt, and the flowers begin to lose their petals. And if those hydrangeas wilt even so, fill the sink with water and soak the heads in it for several hours. Everyday Care of Hydrangeas. Wilt and browning are difficult to diagnose, as there are many factors that may be the cause: too much sun, wind, not enough water, to much water, etc. A hydrangea's flowers signal the end of their bloom period by wilting and drying. Water your hydrangea if it is wilting and the soil is dry. Hydrangeas do not wilt in the heat here, it's over 90 every day for months. Hydrangeas grow and bloom best in areas where they can get at least a few freezes in the winter. What happening and what can I do – Thanks in advance! 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