Is there a way to get rid of "goat heads"? (Weeds that have spikey burrs with yellow flowers in Eastern CO)

Nothing I have tried kills them, I pull them constantly but the house next door has a terrible weed problem. They are fast growing and viney and even the garden shops have different ideas. I wish I could find something environmentally safe and not have to torch my whole back yard!

Is there a way to get rid of "goat heads"? (Weeds that have spikey burrs with yellow flowers in Eastern CO)
A broad-leaf weed killer may kill them. Round-up will kill anything it touches, so be careful. Try using a pre-emergent next spring to kill the seed before it germinates.
Reply:Ever tried Roundup? Good stuff and you could even spray the neighbors too and get rid of them. If you don't want to kill any grass, that may be in with it, go with 2-4-D that you can get from a farm store or gardening supply place. Safe for grass but deadly for weeds that are broadleaf.