herbicide ithat will not kill periwinkle
What herbicide is available that will not kill periwinkle? I want to establish periwinkle as a ground cover but weeds and grasses overwhelm the periwinkle.
Certified GKH Gardening Expert
You pretty much have two choices which are to pull the weeds by hand or carefully paint, with a small artist paintbrush, the foliage of the weeds with a herbicide such as glyphosate, being careful not to touch the periwinkle. You should also put a few inches of mulch around your periwinkle to suppress unwanted weeds.