creating a garden

Question

how to keep the grass from regrowing in the garden patch

Answer 1

These articles will help you.

https://www.gardeningknowhow.com/plant-problems/weeds/how-to-kill-grass-naturally-kill-unwanted-grass-in-your-yard.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/vegetable-weed-control.htm