Best Time To Plant Hydrangeas Whenever possible, plant in early summer or fall. Don’t plant in early spring when frosts are still possible. I’ve lost two leafed-out plants that were killed when a late frost hit them. Don’t plant a hydrangea during the hottest part of the summer unless it can’t be helped.Click to see full answer. Hereof, what is the best time to plant hydrangeas?For best results, plant hydrangeas in spring or fall, when temperatures are mild. You can plant hydrangeas when blooming specimens become available in nurseries in early to mid-spring.Subsequently, question is, how do you transplant hydrangeas in the fall? Transplant Hydrangeas in Fall Transplant at the right time. Plan to transplant before the ground freezes over. Find a new home. Pick a place for the hydrangea that doesn’t receive too much sun. Dig carefully. Use your shovel to make cuts around the hydrangea before actually digging it up. Plant right. Give them a drink. Watch closely. Mulch. Beside above, do Hydrangeas like sun or shade? Most hydrangeas thrive in rich, porous, somewhat moist soils. Add compost to enrich poor soil. They prefer full sun in the morning, with some afternoon shade; however, many will grow and bloom in partial shade.What side of the house do you plant hydrangeas?Light-O-Day would be best planted on the east side to protect the variegated foliage. The only thing to watch for with hydrangeas on the south side is to make certain that you water deeply the first couple of years to grow good roots and get them established.