preen weed control- dose it need water to work?

Yes, anytime weed control or fertilizer is used. Water must be applied right after. If you do not like to water your grass. Watch the weather report to see when it is going to rain. Put down your product the day before and there you go. This is the way I do it and it works. For example, yesterday I was putting down everything I needed for my grass and at 10:00 pm last night it rain. I personally did not water my grass, but God did.

Per the instructions: •Mow lawn to normal height 1 to 2 days before applying this weed control product. •Water lawn thoroughly at least 1 day before application to sustain moisture until the next watering. •Apply weed control product when weeds are young and actively growing, preferably in the morning when dew is on the grass. If grass is not moist at time of application, sprinkle lightly with water to hold the material and prevent dust drift onto nontarget plants. •Do not wash from weed leaves for 1 to 2 days after application of weed control product. At this time a thorough watering should be made. So yes, the best results will require watering prior to application and again a few days after application.