You will only get to know where the seeds fell once the grass starts to grow. You can get your states extension office to test your soil for you so you know how healthy and whether it will support growing food.
Matured grass broadcasts its seeds all over the garden and there is no way of controlling this.
How to kill grass in garden. Table of contents How to Kill Grass in a Rock GardenPl. Simply take concentrated vinegar dilute it with some water 1 part vinegar 2 parts water and carefully apply them to the weeds. This is viable when the grass is just sprouting.
A mixture of one cup of salt dissolved in 2 cups of hot water will also work. You want to kill the grass in a manner that will keep the soil healthy. Learn simple ways to use products and household items to kill grass or weeds growing in a rock garden.
Mow or weed-wack the area and then cover with cardboard or several layers of newspaper both are readily available at little or even no cost. Water to moisten it well and top with a thick layer of compost and several inches 5 to 76 cm of bark mulch. If you plan on growing food dont kill the grass with glyphosate.
You can use one of two ways to kill grass in garden areas with plastic. Over this apply several layers of organic materials over the cardboard. This will constitute the smothering layer that serves to kill the turf.
One of the best natural ways to kill grass is with lasagna gardening or sheet composting. After outlining the garden area first apply a thick layer of cardboard or newspaper over the grass. This will kill the seeds and roots of all plants in the soil beneath the plastic.
The grass absorbs the poison and transfers it to the roots. Some gardeners spray with full-strength apple cider or white vinegar but rain dilutes their effectiveness. When thinking about how to kill grass in flower beds without killing the flowers uprooting the weed will come to mind first.
Common organic materials you can use include. Then you spray the grass to wet it. Wetting the grass and treating it on a sunny day will accelerate the process.
To use glyphosate to kill grass you must wait until the soil temperature is at least 60-65 degrees. After newspaper and cardboard its probably the cheapest way to kill grass. It will take up to 40 hours for all the grass to dry off.
The poison kills the roots. If a large area of the garden is infiltrated by grass you can kill the grass by laying clear plastic over the area and allowing sunlight to heat the soil beneath it. If you have a few weeds popping up through cracks in your patio or walkway pour a little bleach on them and wait a couple of days to pull them up.