I have approximately a 20 square foot yard area of stubborn weeds and wondered if removing the topsoil and replacing it would be a better option than using chemicals. I have tried using sodium chlorate and they just grow back. What are your thoughts?
If they are broad leaf weeds, you can use a broad leaf specific herbicide to help eliminate them. But if they are grass like weeds, you may not have any choice but to either hand weed or consider re-seeding the lawn.
It sounds like though that you may have some underlying issues that are contributing to the loss of the desirable grass. Often when weeds set in like that, there is something about the soil keeping the desired grass from growing healthy and then giving the weeds an opportunity to get a hold.
You may find these articles helpful:
https://www.gardeningknowhow.com/lawn-care/lgen/what-the-weeds-in-your-lawn-are-telling-you.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-types-and-weeds.htm
https://www.gardeningknowhow.com/lawn-care/lgen/tips-for-improving-the-lawn-and-reducing-maintenance.htm
I have used vinegar to kill the grass and weeds in my front yard. How long should I wait to have it replaced with floratam sod? Does the vinegar contaminate the soil, and will it kill my floratam sod that I have put in?
Vinegar works its way out of the soil quickly. The soil should be fine in a week and if you want to make doubly certain, wait till after a rain or water the soil some to help leech any remaining vinegar away.
Is there something or some way of keeping the weeds down in my berm? I get a lot of grass and weeds.
Adding mulch and edging can drastically reduce the amount of weed growth in your berm.
Can you kill lawn weeds with white vinegar? A friend told me that you can kill lawn weeds by spraying vinegar. Is it true, and if so, at what percentage of vinegar and water?
This is true, but the type of vinegar you buy at the store is not strong enough to kill the weeds in one application. You will need to apply it several times without diluting it with water.
Vinegar is a full spectrum weed killer, meaning it will kill or harm any plant that it is applied to.
How soon after applying white vinegar to grass and unwanted weeds in a garden can I plant vegetables and other flower plants?
You can plant after about a week. To make extra sure, water the area before planting to help dissipate any remaining vinegar.
Should you put Round-Up on grass to kill it before tilling the soil to make a home garden?
Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/plant-problems/weeds/how-to-kill-grass-naturally-kill-unwanted-grass-in-your-yard.htm
https://www.gardeningknowhow.com/special/urban/raised-beds-for-urban-settings-no-digging-required.htm
My garden has many weeds and ground cover weeds. so I need to really spray it good. So, do I rototill before or after? Then, how long should I wait to plant? Thank you!
I would recommend spraying before you till. Give the Roundup a few days to work, then till. Then wait at least one week (two if you can to be sure) for the Roundup to break down and to plant your plants.