How to Get the Greenest Lawn in the Neighborhood! It’s Simple!

Is it okay to let weeds/crabgrass grow if they’re not big or numerous?

NO! I repeat, no! You should kill weeds and crabgrass as SOON as they show up. Use either an herbicide or natural mixture, but don’t let them live. Kill the weeds right when you see them so they don’t harm the rest of your lawn.