Question On Spray For Flower Bed

This might help Controlling Weeds in Flower Beds - LSU AgCenter

I spray glyphosate (e.g., Hi-Yield Grass Killer) non-selective herbicide on weeds in my landscape beds, taking care not to have the herbicide contact the shrubs. Glyphosate won’t harm the shrubs unless it makes contact, and even a little accidental contact wont harm a mature shrub. Follow this with heavy mulching - I personally like pine straw, 3-4 inches thick, but use the mulch of your choice.

You can also add some granular pre-emergent herbicide (read article for options) after adding the mulch, and water it in. Don’t do that if you plan on planting flower seeds in the bed.

ETA: after re-reading the article I posted, I noted no specific name brands of pre-emergent herbicides are mentioned. Dimension (dithiopyr) would be a good one, fairly inexpensive and you can also use it in lawn (doesn’t control sedges or chamberbitter), and Gallery (Isoxaben) is very good, more expensive though, but it does control chamberbitter.