How To Care For Hydrangeas Outdoors. Caring for Hydrangeas They need regular watering to keep blooming throughout the season. Feeding and fertilising Mulch hydrangeas every year.
The process is relatively simple as long as you follow the basics of hydrangea care. Hydrangeas grown for outdoor planting will be able to be planted out straight away. Water deeply once a week and maybe more if the weather is particularly hot or dry.
Water with rainwater to keep hydrangeas blue.
Water at a rate of 1 inch per week throughout the growing season. When you grow the Hydrangeas outdoors make sure to place the plant in half-shade and away from the wind. Water at a rate of 1 inch per week throughout the growing season. Put your Hydrangeas in half-shade.