Corn speedwell weeds are common throughout the United States. After 10 days I applied 2x strength Resolva lawn weedkiller. How well does QuinKill Max Crabgrass and Weed Killer work on winter bluegrass plus broadleaf weeds? In Indiana, what best time use Dimension to control speedwell and chickweed in bluegrass lawn? Previous Next. Description of Speedwell (Veronica officinalis): Speedwell, also known as Veronica, is a perennial herb that has bluish flowers. In a few years, it can spread from a few patches to cover the entire lawn. 10 days after I gave the lawn my normal short mow, raking , scarifying, over seeding and fertilising treatment. Speedwell, also called creeping Veronica, was originally used as a rock garden plant but has become a weed, invading lawns and flower beds. So far the lawn is free of any sign of germander speedwell. It does not completely crowd out desirable grass, however. Typically, winter annual weed seeds germinate in the fall and grow throughout the "warmer" days of winter. The weeds will take over a lawn with a thick bed of leaves that will sprout pale blue and white colored flowers. Large (6) Medium (6) Where To Use. Winter Annual Weeds. Concentrate (2) Ready-to-Spray Hose End Sprayer (3) Ready-to-Use (6) Granules (1) Treatment Area. Other common name: Veronica. Home & Garden Blog. Corn speedwell is one of the most prevalent of the weedy species, others include: Germander, Persian, Creeping, Purslane and Ivyleaf. Solution Type. The speedwell went yellow and began to loose leaves. Would Gordons Trimec Classic Broadleaf Herbicide work on veronica speedwell in a northern lawn? There are approximately 500 species of speedwell. Get free shipping on qualified Speedwell Ortho Weed Killer or Buy Online Pick Up in Store today in the Outdoors department. If so, at what ratio should it be applied? Speedwell rarely reproduces from seed as it is a self pollinating plant. Slender speedwell is a low growing weed, that will happily tolerate even the lowest mowing heights. Selective weedkiller containing Dicamba or Mecoprop, treat in March or April, add a little detergent to solution to aid wetting. See also:- Common Field Speedwell, Germander Speedwell Ivy-leaved speedwell and Thyme-leaved Speedwell. Follow these links for further … Speedwell Weed Killer Veronica officinalis Herbicide. This species can be found growing in moist or dry soils, in full sun or shade, and where turf is thin. Lawn (12) Scrambling Speedwell Botanical name: Veronica persica Family name: Plantaginaceae Overview. How To Kill And Prevent The Re-Growth Of Corn Speedwell Weeds In Your Lawn. It spreads by producing both overground (stolons) and underground (rhizomes) runners that root at the nodes. You'll notice them growing in the early spring and into summer. Speedwell began to disappear. 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