The product label for Ranger Pro Herbicide does not specify a certain amount of time but it does say that heavy rain soon after application may require a repeat application. The word soon is open for debate, but we would recommend only applying the product when you have a good 3-4 days of no rain in the forecast. 3-4 days of the product being dry should be enough for it to do the job.
Ranger Pro is a non selective post emergent herbicide and it will kill just about any type of vegetation that it is sprayed on so we would not advise for you to use on your lawn.
Our most popular general weed control product that is selective, meaning it will not harm your turf grass but it will kill your broadleaf weeds, is End Run. End Run is labeled for just about any weed you could have and will not harm your grass. Best of all, it comes with a surfactant already mixed in the product so you do not have to purchase and mix a surfactant separately like you do with most of the other herbicides that we sell.
Ranger Pro Herbicide for a 4% solution, would be mixed at 5 1/3 oz per gallon water.
It is best to apply Ranger Pro Herbicide when the plant is actively growing and not under stress which would be when the temperature is above 55 degrees and below 85 degrees.
Ranger Pro Herbicide can be used in and around a vegetable garden plot (keep away from any desirable plants) but you should wait at least two weeks before you plant anything in the area where the product was applied.