Q. I would like to put in an evergreen low groundcover under an oakleaf hydrangea. Looking for a perennial native groundcover. Suggestions?
Low growing junipers such as Juniperus procumbens `Nana`, Juniperus horizontalis wiltonii (carpet juniper), Juniperus sabina tamariscifolia are evergreen and will thrive in the sun. You might also look at the "subject guides" on the PHS website for more information.