Most commonly known as 'Annabelle' hydrangeas (even though that refers to a very specific variety), Hydrangea arborescens is a North American natives species combines the old-fashioned charm of Grandma's garden with the no-fuss maintenance you're looking for. No longer confined to just white blooms, today's smooth hydrangea offers a range of colors and sizes that work in just about any spot in your garden or landscape.