Is it safe to assume that the silence from the forum means that my plan makes sense and is on track? :D Was really hoping to hear from someone! :)

It does grow in round clumps and seems to be taking over my bermuda turf in my backyard. I'll gladly pay the $115 for the stuff rager suggests if you think it will work. This post was edited by broker02 on Fri, May 31, 13 at 13:49

It does look like you need to be mowing weekly, at least now while it's raining a lot. When it gets hotter you might not need to. There is an organic pre-emergent (blocks seed sprouting but does not kill anything) called corn gluten meal that you could try. It is a nitrogen fertilizer but it does not have as much nitrogen as chemical fertilizer and it is released more slowly into the lawn. I used to buy it at a cattle feed store (it is a protein additive that is used in lots of pet and cattle foods) and it was not too expensive when sold as feed. The kind that is sold as fertilizer is a lot more expensive. I had really good luck with it but I did have a spreader that would dump more than it was supposed to, so I spread it pretty heavily compared to instructions--about 50 pounds over 2000 sq ft or so. Anyway, my lawn looked really good when I used it, better than any chemicals I have tried. But like I said, it doesn't kill weeds, it just stops seed sprouting. If you really can't spray anything to kill them, then the only option is to pull all those weeds or keep them mowed short and hope the grass chokes them out. Also, some of those weeds will die once the weather gets hot.

Thanks but I googled barbarea vulgaris the leaves do look different. I think it looks like wild turnip or wild mustard but still there are some differences. They are resistant to Roundup so I'm desperate to know what they are.