Is there a spray I can use to rid a play area of goat head sticker grass and other weeds/grasses, including killing the seeds?
Getting Rid of Goat Head Sticker Grass and Other Weeds/Grasses
Certified GKH Gardening Expert
Round-up is pretty all inclusive when it comes to killing every part of a plant. If you are looking for something more organic, boiled water will do the same. But be aware, both of these will kill any plant that it comes in contact with.