Question
need to know when and the best place to plant them the type of soil and in full sun or part sun?

Answer
Hello Betty,

Hydrangeas can be planted now. The best place to plant is where you have the space to grow them. They can get quite tall and wide.  Grow in moist, but well drained soil.  Moderately fertile, and humus-rich soil in sun to partial shade. protect from drying winds.

hope this helped

Bud Christmann