Robert from Nc writes
Crossbow Herbicide is not labeled to control sandspur aka sandburs nor for use in home lawns. This is a summer weed that is actually easier to prevent then to kill once emerged. We would recommend applying a pre-emergent like Dimension 2-4 weeks ahead of when it germinates. You can check with your County Extension Offices for the correct timing.
Answer last updated on: 09/26/2017