how to plant hydrangeas

Question

Have hydrangeas in a pot and want to plant in garden.

Answer 1

This article should answer your questions: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/growing-hydrangeas-hydrangea-care-guide.htm

I would suggest planting them now instead of waiting until spring. I would also suggest a collar of mulch around the base of the plant.