Preemergent herbicides

GALLATIN, Mo. — Missouri’s unpredictable spring weather makes it tough to decide when to apply preemergent herbicides on lawns, says Manoj Chhetri, University of Missouri Extension horticulturist. Preemergent herbicides, a form of chemical weed control, prevent germinated weed seedlings from growing. Preemergents must be applied at the right time of year to be effective, says…