The present application describes formulations of clomazone having unexpected reduced volatility in a non-encapsulated emulsifiable concentrate (EC) formulation. The discovery that the volatility of clomazone can be reduced in a non-encapsulated formulation by the addition of certain second active compounds is surprising, and can provide the benefit of faster delivery of clomazone to treated crops, while reducing the damage to neighboring vegetation as a result of clomazone volatility.