The grass keeps coming back in my flower bed even after using two sheets of black plastic and mulch?

I'm tired of pulling grass out of my flower bed, I have put two layers of black plastic down and mulch and I have sprayed it with a safe against shrub grass killer. Please help!The grass keeps coming back in my flower bed even after using two sheets of black plastic and mulch?
Yes, grass will rear its ugly little head even with black liner, mulch etc...Just when you see weed, pull it. I have my kids even pulling weeds now because they know they are not supposed to be there. If you do it every morning, you'll get a hanle on the weeds and you'll be okay and weed free.The grass keeps coming back in my flower bed even after using two sheets of black plastic and mulch?
try using preen

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You may have a type of grass that is growing over your edging. First I would be sure that you keep a crisp edge 2-3 inches deep between the lawn and the shrub border. Too much mulch over the fabric can create a place for grass to seed as well, I would think about a non-organic mulch like stone or gravel.
Maybe your mulch contains weed seeds? Maybe your mower has been shooting them into the garden?





You can try using the pellets that you sprinkle into the beds like preen that also has flower fertilizer and weed controller.

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