Does anyone know how to keep the grass out of flower beds other than using commercially bought edgers?

I've tried large rocks in the past, but it didn't work as great as I thought it would. I didn't get to keep it up last year and I'm having a horrible time getting it out of the beds!

Does anyone know how to keep the grass out of flower beds other than using commercially bought edgers?
To help keep grass out of flower beds, I have tried digging a 3" trench, which I leave bare, no mulch, rocks, just dirt. It makes it easier to "stop" the grass growth, and I have been lucky with the grass not invading the trench. Once a year, if necessary, I carefully spray "round-up" on the grass on the outer edge of the trench, and this helps too. Just be careful it isn't a windy day, and some of the round-up doesn't get on the flowers in your bed.
Reply:Be vigilant! Hand weeding when you see the start of an invasion. Keep the line of bed with an old kitchen knife which will keep the roots of the grass in order. Don't let it seed! Like most gardening, a little when you pass by will keep things in order.
Reply:I wish I could give you a magic wand...But sometime we just have to bend down on our knees and get dirty..Out side of digging out the sod place weed proof cloth and place some white rocks perhaps...you must stoop!


Sorry

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