In nature, diversity is king. That’s why it can be so challenging to keep weeds out of your lawn. If there’s even a quarter-sized gap in your turf, chances are some seed will find a home there and germinate.
To be honest, the only way you’ll ever have a lawn with zero percent weed coverage is with a lot of chemicals. That’s how golf courses do it, that’s how professional baseball stadiums do it, and that’s how your neighbors with the weed-free lawns do it. When you have a natural yard, you have to accept that nature doesn’t want you to have absolutely no diversity in your lawn.
With that being said, you can still work toward having a lawn with less diversity.
First, having healthier soil will provide a template for healthier turf. That’s where our organic lawn fertilization and Worm Tea service comes in. Strong, healthy grass won’t grow in sterile, lifeless soil.
Next, as you get healthier soil, you need to stay ahead of the weeds. Pull out what you can by hand. But more importantly, fill in the gaps with grass seed after the heat of summer has passed. Late August to mid September is the best time to do this, as it gives the seed time to germinate before winter, and there will be less spots for weed seeds to find a home in the spring.
Buy a bag of a sun/shade blend grass seed. Mow your lawn shorter than you normally would, so the seed will have an easier time finding the soil. Shorter grass also means you can go a little longer between mows, which gives the seed a better chance at germination too. Next, broadcast it with a spreader or scatter it by hand. Mixing the seed with top soil and compost before you broadcast it can be helpful. Larger bare spots in your yard could benefit from applying that seed/soil/compost mixture as a “patch.”
Finally, if you've got more than 60% weed coverage in your lawn, you may have to come to the conclusion that the weeds have taken over. If you want grass to reclaim your lawn, you'll likely have to re-seed or re-sod. It's just too difficult to bring back healthy turf once the weeds take control, especially if you're going the chemical-free route.
Steve & Corey Veldheer are organic yard & garden specialists in west Michigan.