I've noticed on some of my lawns that since the grass has stopped growing the patches of weeds really stand out. Does it make sense to treat them now? Or is it a waste of time. Thanks.
Thanks great information.Yes.
Some weeds are annuals, others are perennials. You need to identify the weeds to know whether or not they'll come back in the Spring.
For example common mallow is an annual, so is crabgrass. They won't start growing again next Spring.
Other annual weeds will sprout in the fall, survive the Winter and keep growing in Spring, then die when the heat of Summer hits.
Dandelions are perennials and will survive the Winter and continue growing again next year.
If you want to start spraying your lawns you should look into getting licensed before Spring.