Gary from Hoschton, Ga writes
Yes, Hi-Yield 38-Plus Insect Control is safe for use on periwinkle. It is safe for use on ornamentals, lawns, trees, shrubs, vines, perimeter treatments, flowering plants, conifers, woody non-edible ornamentals, and herbaceous non-edible ornamentals
Answer last updated on: 09/27/2016