How To Prevent Weed Seeds From Germinating

Learn how to prevent weeds and keep weeds from growing in your garden, lawn, and other landscaping areas with these gardening tips from HouseLogic. From blocking pure light to shading the soil, cover crops prevent weeds in many ways

Weed Control Tips to Prevent Them From Ever Sprouting

When it comes to weeds in your garden, an hour of prevention is better than a season of yanking.

Unlike seeds and plants you buy from catalogs and nurseries, indigenous common weeds are naturally suited to the sun, soil, and water conditions of your garden. That’s why weed control is so hard.

But if you prevent weed seeds from germinating, your garden will be weed-free. Here are some surefire ways to keep weeds from growing in the first place.

Don’t Disturb the Soil

Weed seeds “sleep” in your soil all the time, just waiting for sunshine to enable them to germinate. Left underground, many weed seeds remain dormant for years. So the less you disturb the soil, the more likely weed seeds will remain asleep.

Avoid high-powered tillers, and go easy on the hand cultivating. Sow your flower and vegetable seeds above the ground in mounds of compost, shredded leaves, or even in bags of topsoil. Better yet, plant seedlings and starts.

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Smother Weed Seeds

Another way to keep seeds asleep is to cover your soil with sun-blocking organic or synthetic mulches.

Organic mulches — hardwood mulch, newspaper, cardboard, straw — degrade in a few months and improve soil structure and add nutrients. Synthetic mulches — landscaping paper, plastic — can last several seasons, but won’t help rebuild soil when they eventually degrade.

Heed these mulching tips:

  • Wet the ground before you lay down layers of paper, which will prevent the paper from blowing away while you work.
  • Scout yard sales for old carpet and wallpaper, efficient sun blocks that prevent weeds.
  • Spread mulch 2 to 4 inches deep to suppress weeds and retain moisture.
  • Always pick straw, not hay, to prevent weeds. Hay usually contains hayseeds, which will sprout where you’re trying to keep weeds out.

Learn more with our handy mulch guide.

Wage a Chemical Attack for Weed Control

Pre-emergent herbicides prevent weed seeds from germinating, but don’t kill existing plants and grasses.

The exact timing for applying a pre-emergent herbicide is hard to pinpoint because you must spread the herbicide before seeds germinate, which happens underground at different times.

Conventional gardening wisdom says spread pre-emergent herbicides when the daffodils pop or the forsythia wilts. But advance planning is the best way to determine when to spread. Log the date when you see the first weeds in your garden, then subtract three weeks to arrive at the date you should spread the pre-emergent herbicide next spring.

Grow Plants Close Together

The closer together you plant your flowers and vegetables, the less space weed seeds will have to grow.

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If you double-dig — loosen (don’t pulverize) soil at least 2 feet down — you can plant cheek-by-jowl, because plant roots can grow down, not out, to find water and nourishment. If you plant intensively in a diamond-shaped pattern — rather than rows — you’ll avoid barren spots where weeds will grow.

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Lisa Kaplan Gordon

Lisa Kaplan Gordon is an award-winning, Pulitzer Prize-nominated writer who contributes to real estate and home improvement sites. In her spare time (yeah, right!), she gardens, manages three dogs, and plots to get her 21-year-old out of her basement.

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How can you prevent weed seeds from germinating in your garden?

Newswise — March 22, 2021 – Have you ever considered using a cover crop in your home garden? Farmers use them often. Cover crops have a lot of benefits, including weed control! This Sustainable, Secure Food blog explores the life of the weed seed and how cover crops can prevent these unwanted seeds from germinating in your garden. The blog post is part of the 2021 Seed Week celebration, organized by the Crop Science Society of America.

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According to blogger Gina Nichols, cover crops can prevent weeds by:

  • Providing protection for seed-eaters. It’s harder for a hawk to see a mouse running along the ground if there’s a cover crop. The mice protected by the cover crop will eat a lot more seeds.
  • Preventing weed seeds from germinating. Weed seeds will only germinate when they sense pure light, which is blocked by the cover crop.
  • Competing with weeds for resources. Cover crops hog a lot of the things a seed needs, including light, water, and nutrients.

To learn more about the benefits of cover crops and how to integrate them into your garden, read the entire blog: https://sustainable-secure-food-blog.com/2021/03/22/how-can-you-prevent-weed-seeds-from-germinating-in-your-garden/

About us: This blog is sponsored and written by members of the American Society of Agronomy and Crop Science Society of America. Our members are researchers and trained, certified professionals in the areas of growing our world’s food supply while protecting our environment. They work at universities, government research facilities, and private businesses across the United States and the world.

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Credit: Gina Nichols

Caption: A happy garden area goes into the winter covered by a winter rye cover crop at Mustard Seed Community Farm in Ames, Iowa.

Credit: Gina Nichols

Caption: A winter rye cover crop is preventing small weed seedlings from growing.

Credit: Gina Nichols

Caption: Seed-eaters such as mice can hang out and eat weed seeds under cover crops, safe from predators.