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how to plant grass seed with weeds

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This article was co-authored by Lauren Kurtz. Lauren Kurtz is a Naturalist and Horticultural Specialist. Lauren has worked for Aurora, Colorado managing the Water-Wise Garden at Aurora Municipal Center for the Water Conservation Department. She earned a BA in Environmental and Sustainability Studies from Western Michigan University in 2014.

A patchy and weedy lawn is unpleasant and unappealing. Luckily, there are ways you can get rid of the weeds and replant grass seed to have a lush lawn. Before you start, it’s important that you purchase the right type of seed for your environment and you test your lawn so you know which kind of amendments and compost to use. If your lawn is really spotty and full of weeds, you should kill all of the weeds and old grass in your lawn and start over. If you only have a few weeds, you can spot weed and reseed.

Wait until the grass is 3-4 inches tall before mowing for the first time. Avoid weed killers until the grass is established, as well.

Fall is a great time to overseed! The weeds should be dying down at this point. Check your local weather forecast for frost warnings. It is best to plant grass seed at least 45 days before the first frost. This will allow the new seed to take root before it goes dormant.

Author: Matt Hagens

How do I grow grass in a weedy yard?

If you do see any weeds pop up in the grass seed area, pull them right away! Don’t use a weed killer quite yet. Your new grass can’t handle an herbicide at this stage.

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Many people will spread hay over new grass seed to protect it as it starts to grow. Often hay will contain weed seeds or hay seeds. Use a paper pellet mulch instead to keep your new grass weed free, protect it, and lock in moisture!

While certain types of grass choke out weeds once they are established, grass seed on its own will not kill weeds. Zoysia is a popular choice of grass for weed control. It forms a thick turf that won’t allow weeds to grow.