Lay down a thick layer of CARDBOARD in your raised garden beds to kill the grass. It is perfectly safe to use and will fully decompose, but not before killing any grass below it. They’ll also provide compost and food for worms. WORKS BEAUTIFULLY.
DIY--A compost bin is a necessary companion to My new garden. This one is less eye-pleasing, but doubles the composting with a stacking system. The darker the barrels, the warmer they get, which is what you want with composting.