Hi all, about 4 yrs. ago I received a small potted hydrangea as a gift, planted it and it has been my favorite shrub ever since, i def. need more. Apparently a branch that was laying on the ground most likely, taken root. That has been there for 2-3 yrs. now, can I cut from main plant, if necessary, and replant elsewhere, and will it do well?

I would like to send pic. if I can figure it out, the whole shrub is approx 3x3' and covered in large dusty pink balls, about for the last month. Looks like the pic/drawing in the upper right corner of this forum, dark green leaves.

thanks!!