How To Care For Hydrangea Bush. A north- or east-facing site where temperatures remain somewhat constant is a better choice than a spot on the south and west side of your property which will heat up in the winter sun and can cause buds to open prematurely and be vulnerable to. Gently loosen the roots then plant using plenty of rich soil.
You can move your hydrangeas in the garage or other cold area in your home where they wont be exposed to frost and chilly winds. If you plant them in the summer they need a lot more water in the beginning to establish the root system. And if your flowers are looking sad Bladow suggests soaking the entire hydrangea in cool water for about 45 minutes.
Hydrangeas can also be transplanted easily but this should only be done during dormancy in fall or winter.
They need soil with a constant level of humidity. Potted Hydrangea Winter Care. Gently loosen the roots then plant using plenty of rich soil. Water at a rate of 1 inch per week throughout the growing season.