It is also safe to use on some groundcovers. Gallery has become quite popular in the few years that it has been available because it may be sprayed over the tops of quite a few ornamental plants, including some perennials, groundcovers, and bulbs. It may be used in both landscape and nursery, container and field. Grass Herbicides . Preemergence herbicides that are most effective on grass weeds include Pennant, Devrinol, Barricade, Pendulum, Surflan, and Treflan.
Pennant provides good preemergence control of nutsedge in addition to annual grasses.
It is labeled on many woody ornamental species and also some ground covers, bulbs, and herbaceous plants. To reduce the chance of injury, wash this product from the foliage of desirable ornamentals when applied over the top. Image is a new product that also controls nutsedge by pre- and early postemergence applications. However, it has a limited label for landscape ornamentals. Devrinol is a good choice for fall herbicide application because warm temperatures and light reduce its effectiveness and longevity.