All depends what the active ingredient of the chemical is, the turf type you intend to spray, climatic conditions, soil temps and availability of irrigation.

 

1999,
The label will direct you to NOT apply these types of herbicides through any type of hose end sprayer. The problem is the pressure and drift caused by these types of applicator's.
Not only is the Weed-B-Gone corrosive to these cheap things, it is the fact of inaccurate mixing that is concerning. Even if you reduce the pressure at the faucet, the correct amount of mixture is impeded. If you should use one anyway, then use the diverting tip that comes with the unit. Make sure there is no wind at all and stay close to the ground. Lastly, what kind of sticking agent are you planning on mixing with this product of choice.?????
As far as the time of application and the amount per site, it is stated on the label. Typically, it may state that 2-4D material can only be applied to a site twice as a blanket spray and multiple times for spot spraying as long as you do not exceed XX amount of ounces per acre.
Keep in mind the drift...............the overspray that will float off to you or your neighbor's plants and trees............!!!!!!

 

good advice from Think Green however, it can be done. Dilution should be like 1 to 1.5 oz/G. might be in TSP or TBS. check wikipedia. 6 teapsoons is a liquid oz. 2 Tablespoons is a liq. oz. Most cheap hose-end sprayer are not very accurate and the o-rings and seals won't last very long. But it will work.... a couple times....

 

... Lastly, what kind of sticking agent are you planning on mixing with this product of choice.?????

out of curiosity, have you ever mixed herb' concentrate with sticker concentate? ...just wondering if that would work...?

 

Don't do it. Amine herbicides turn into goo if they are mixed concentrated with surfactants.

 

Yep, green is correct as due to the dissimilar chemical composition amine herbicides require a great deal of agitation to remain in suspension with the surfactants.
Just do a compatibility test - also the temperature of the spray water is critical as well - cooler temps equals more problems.

 

Good advice. Since the spray goes out in front of you, go to the fartherst part of lawn and walk backwards away from the spray. don't trip. Don't get near flowers. Also wear rubber boots and pants or as the label directs.
You may end up wearing a lot of Weed B Gone. Keep the pressure low. Best to have an assistant turn on the hose back at the house.