Rebecca from Graham, Wa writes
Very small quantities of spray, which may not be visible, may seriously injure susceptible plants; however, Fir and Cedar trees are not listed on the label as either tolerant or suseptible. We recommend to avoid overspray or spray drift to ensure the trees are not affected. Please review the Avoid Injurious Spray Drift section on the Crossbow Herbicide prodcut label.
Answer last updated on: 06/06/2017