Annual summertime grass weeds like crabgrass, goosegrass and foxtail will sprout aggressively in water logged soils. The same May rains that made lawns so nice and green in the spring will break down the effectiveness of early spring crabgrass preventers. Areas around driveways, sidewalks and patios are particularly prone to this problem. Concrete surfaces absorb and intensifies summer heat and make a natural incubator for hot weather weeds along its edges.
Related: Uncle's Idiot Proof Lawn Care Program
PREVENT!, crabgrass preventer, applied in late May to early June provides a booster shot to extend weed control and prevent crabgrass all summer long.
Gardens and flower beds have the same problem. Well tended beds fall victim to an invasion of aggressive summertime weeds. Garden weed preventers applied in early spring are simply overwhelmed by extreme spring rains. For best results, three booster applications spaced six to eight weeks apart will keep gardens and landscape beds clean all summer long.
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Nutgrass is a common problem in summer lawns, even after an average spring. Nutgrass is not controlled by crabgrass pre-emergence. Nutgrass plants can regenerate from small nutlets formed on their root system under the soil surface. These nutlets go unharmed by pre-emergent and traditional contact weed controls, making nutsedge difficult to control.
Nutgrass or nutsedge has triangular stems with leaves that branch out in three different directions. Light green to yellow in color, nutsedge grows quickly in spring and summer, outgrowing grass in just a couple of days after mowing.
Timing is everything, and early control is best. Nutgrass plants allowed to mature will stress when treated, stimulating more nutlets to sprout. However; be persistent and continue to spray the new plants as they emerge, and you will be victorious. Avoid pulling the nutgrass plant by hand. Pulling nutgrass will stress the plant and stimulate even more nutlets to sprout.
See Also: Fungus Fighter Turf Disease Control