Some lawns, like DNA Certified Sir Walter, have a growth habit that will usually crowd out most weeds and unwanted grasses. But occasionally these undesirables will invade. Now it’s important not to confuse your weeds with your grasses. Weeds are generally soft round plants where as unwanted grasses include things like kikuyu, couch, paspalum, summergrass and wintergrass. Now these are best removed with a weed wand filled with glyphosate or for some grasses you may want to chip them out with a matic or a garden spade.