You can use edging stones. Nothing will control it 100%, but some type of edging will definitely slow down the spread and make it more manageable - maybe once a month spend a few minutes pulling grass/weeds from the bed, from anything that has crept.

I did a stone edging wall last week and it turned out pretty good for $80 I must say.

 

 

Bermuda rhizomes usually only grow 1"-2" deep. I'd suggest getting some 6" commercial grade metal edging. Set it 3" deep. If anything pops up in the bed hit it with Sethoxydim or Clethodim.

 

Easiest way to keep Bermuda out of the mulch bed? Get rid of the mulch bed and accept your larger lawn.

 

Easiest way to keep Bermuda out of the mulch bed? Get rid of the mulch bed and accept your larger lawn.

 

Use fusillade only this area

 

I had the same problem. Decided to go with a deep/low bed. Bermuda is so aggressive it still tries to creep in, but it's certainly minimized it and way easier to control. The surface dirt (I dont use mulch) is about 6 inches lower than my grass. It's like a mini cliff.

 

Use fusillade only this area

I can't seem to understand why people thank Fusilade is the most effective. University studies have shown Sethoxydim or Clethodim are more effective on Bermuda than Fluazifop.

 

I have stone edging on mine and I think it just creates more work. The grass grows between the stone and you eventually have to move the stone to pull the grass.

 

I can only give theory (I hate bermuda) but pre will club bermuda roots. Interesting paper https://soils.ifas.ufl.edu/media/soilsifasufledu/sws-main-site/pdf/technical-papers/Frank_Jason_Immediate_Release.pdf

Maybe zap topgrowth with pelargonic acid mixed with something along the lines of dithiopyr to prevent new shoots from tacking. Neither is systemic so it won't hurt the lawn grass the shoots are attached to.

 

Formed Concrete Curbing is the only way to go ! Look at my journal for pics.