Search
  • South Central Landscapes

How to manage weeds in new grass

Updated: 7 days ago

Don't worry, your new lawn can be salvaged.


Where do weeds in new lawn come from? It's important to understand this process first. In a new lawn, weeds are a result of the soil, not the seed blend. Weed seeds can lie dormant for long periods of time, waiting for their perfect opportunity to germinate under conditions where soil has been tilled and exposed to water and light.


It usually takes about two years to establish a solid lawn. In the first year, grass coverage is roughly 50%, consisting of single, straight blades. The second year will yield about 90% coverage, as rhizomes will fill in the remaining voids to form a solid, dense lawn so long as proper care has been provided.


To manage weeds in new grass, avoid utilizing broadleaf weed killer until after the fourth or fifth mowing. Spraying weed killer too early on immature grass can result in injury. Note that broadleaf weed control is most effective when applied in the fall.


Many common weeds, like velvet leaf and lambsquarters, will be eliminated once mowing begins and by following up with chemical control as needed. If annual grasses, like foxtail and crabgrass, germinate with new seeding, wait until the following spring to apply a pre-emergent product. This will help to prevent the gemination of new weed seedlings.


Weeds like barnyard grass that germinate and grow aggressively during hot periods will be killed by the first fall frost. During the fall and subsequent spring, the dead material will decompose, allowing new desirable grass to fill in the area. Treat with fertilizer to encourage the healthy growth of new grass for the season.


28 views0 comments

Recent Posts

See All

Giving new plantings some attention is the key to long-term success. Plants require approximately six weeks to establish new roots in soil. During this period, water as often as every 2-4 days, and at

Sod is the perfect shortcut to a beautiful lawn, but still requires a level of attention similar to seed during the establishment period. New sod should be heavily watered immediately after installati

Encouraging the growth of your new grass can be a labor of love. With these tips, you'll be on your way to a lawn of full turf in no time. New grass seed should be watered immediately after installati