Controlling Ground Ivy (Creeping Charlie) in Kentucky Bluegrass

Ground ivy (Glechoma hederacea) spreads via stolons and releases allelochemicals that can suppress surrounding plants. In Detroit's Kentucky bluegrass lawns, it's a persistent invader that thrives in shade and moist conditions.

Start with aggressive mechanical removal: a thatch rake pulls up surprising amounts of the creeping stems. Mow tall (3+ inches) to shade out the low-growing ivy—University of Minnesota research shows dense, tall-mowed perennial rye suppresses ground ivy spread.

For chemical control, a borax solution (10 oz borax in 2.5 gallons water per 1,000 sq ft) can be effective but risky—overapplication creates boron toxicity that prevents all plant growth for years. Test on a small area first.

Long-term: improve drainage, reduce shade where possible, maintain thick turf through proper fertilization and overseeding. Ground ivy exploits thin, weak lawns. A dense, healthy bluegrass stand is your best defense.