Thanks guys, the last picture (the closeup) is after I mowed. I was mowing off the weeds that came back. As you can see, it didn't mow any of the brassicas, clover etc...I had the mower deck up high enough that it never touched any of the "plot" plants and still mowed the weeds.

Any other thoughts, you need to remember this is my first attempt and I'm absorbing everything I read from you all. Thanks in advance.