Bonide Captain Jack's Lawnweed Brew, 32 oz Concentrate, Fast-Acting Formula Controls Weeds, Moss, Algae, Lichens & Disease

This saved us from being overrun by dandelions! We haven't used herbicides for over a decade because of how toxic most are. We were trying to weed dandelions in our grass by hand. We couldn't keep ahead of their spread! (And it was so much work!) I've been using this product since spring of this year and it's now late summer. I spot spray the dandelions in our lawn and in our periwinkle. I really saturate each dandelion. We are making great progress! Our lawn looks much nicer. I'm using a two gallon pump sprayer. I also bought a hose sprayer that mixes as you spray for our rental house where the yard is FULL of dandelions. (But I haven't tried it yet.) With spot spraying I find I need to go around and check ideally sometime between 12 hrs and 2 days for dandelions that aren't fully dying. I spray those again. Often one spray kills the dandelions, two times almost always does. But there may be some extra hardy ones that need to be sprayed more times depending on how well established they are. I think once we get the dandelions eradicated I'll need to do my method twice a year to maintain a dandelion free yard. I'm hoping I'll only need to spray each one one time at that point since they won't be established. I try to spray when it won't rain for at least a couple days and also pause our sprinklers from the time I start spraying until a couple days after my final spray. Also I go around and grab any flowers left behind after a day or two so they won't re-seed. (Especially the ones that ripened after spraying.) They're easy to grab because the stalks rot after spraying. Also watch the temperature. This spray works best when it's between 60-80 degrees outside and where the temperature will stay in that range for at least a few hours after you spray. The pores on the leaves close at hotter/cooler temps and this product must absorb through the leaves. I feel like the lawnweed brew actually kills dandelions better than the deadweed brew, although the deadweed brew works on a lot more weeds and works really well and really fast. (It kills all plants, though, so you can't use it in your lawn without killing the grass.) Also if you spot spray you will have black spots in your grass for a while after you spray until the grass recovers. After that it'll be healthy and beautiful!

The first time I used this product I did not get very good results. The little measuring cup that comes with the bottle is a little hard to read and I think I did not add the full 6 oz to 1 gallon of water. The second time I used it.......Shake the bottle before measuring. I measured 6 oz in a glass measuring cup. Added it to 1 gallon of water in the pump up sprayer. Added 1 teaspoon of dish washing soap to act as a wetting agent to help the solution sting to the weeds. Gave the pump up sprayer a couple of shakes to mix everything. Pumped up the sprayer and sprayed my weeds I did not see same day results, but in 2 of 3 days what I sprayed was blackened and dying. I really like the results. It did not kill my St Augustine lawn, just made it greener and it killed all the weeds ! I am in south Texas and we have a 10 month+ growing season, and weeding never ends. Love this stuff. Next my son is going to try this on his dandelions in Madison Wisconsin. I will report back on his results. Cheers!

Used specifically for clover. It kind of worked but did not completely kill. Some sections the clover turned black and died and other sections it did nothing. I’ve read that the clover needs to be young, once it matures this stuff may not work as well.

I've dealt with clover in my fescue and bluegrass mix for years. I've tried misotrione, tripoclyr, SpeedZone, and other 3- and 4-way herbicides and the clover just keeps coming back. Unsure if it will return after treating with Captain Jack's Brew but this stuff knocked the clover down in less than 24 hours. Really impressed with the impact, speed, and the fact that it's basically organic. Sprayed on some dallis and quack grass and some mossy areas and it also knocked those down without a problem. This is my new go-to for weed control and will also be trying on rust and brown patch when they show up.

Uses prescribed dose indicated on the label. Sprayed dandelions on a sunny, mid day with a sprayer accordingly. The label said the weeds would be brown within an hour of spraying. No rain or moisture of any kind. The next morning I checked on my work, and the dandelions looked healthier than before I sprayed. Not a bit of even wilting.

I've used the spray bottle for the last 2 years and it works great. I decided to try this concentrate and broadly spray the lawn this year. Even using a pretty strong water ratio (I could see the brownness as I sprayed) this just didn't apply to the weeds as well as the spray bottle. It's more work using the spray bottle for sure, as you have to get on your knees and spray each weed, but it just works better. After using this concentrate, most of the weeds looked a little sickly, but not straight up dead like I'm used to with the direct spray bottle application. I'll be going back to the spray bottle next time.

love this stuff, effective weed killer and it really increased the grass health quite a bit

This is the only product I've found that puts a dent in Lesser Celandine—Ficaria Verna, an invasive plant—while not harming grass, desired plants, or critters. It takes a couple of days after spraying to see results—shriveled, blackened leaves. Photo shows effect (on top) two warm days after spraying; bottom is yet to be sprayed. Best effect if spayed on warm days when leaves are dry. Lesser Celandine requires multiple treatments, over multiple seasons, as this ephemeral invasive plant has tubers from which it sprouts new leaves. Captain Jack's Lawnweed Brew seems to be the same formulation as Bonide's older product WeedBeater Fe.