Need Help on uneven ground cover growth.
I have vinca under a large old oak. It grows much thicker on the back side of the tree. I think there is more wind hitting the front of the tree and wonder if this is the reason the vinca doesn't grow as well there. The front of the tree has a sourthern exposure, so it gets a little more sunlight, but it's mostly shady under the tree. I have planted Asain Jasmine in the front also thinking this might grow better, but I'm not sure it's helped. After two years the ground cover still looks uneven. Irises, ferns and hostas are also around the tree. The irises have spread more in the area receiving less wind. We're going to have a shed placed in the path of the wind, hoping this will help. Any other suggestions would be appreciated.