How do you kill weeds and grass around flowers?

u can just pull them out

Good question, I have that same problem. Weed eater sounds the most obvious, although I don't have one. I do have some shears used to cut chicken skin etc.......works but it's time consuming.

Unfortunately there is no selective herbicide that will safely remove weeds out of flower beds without harming the plants you want to keep. The sure fire way to remove those is to hand pull them. Maybe have your kids go out there and do it, if you trust them. Another option... if your plant bed is ever empty of your flowering plants, spray roundup or other herbicide before you plant anything, then put mulch down to keep weeds under control. A tip from one of the professors I had was to go around with whatever herbicide you have and use a brush or something to 'paint' on the herbicide being careful not to touch the 'good' plants! This may seem tedious, but it's either that or hand pull them!

Pull the weeds out by the roots and use Preen, it fertilizes and kills any new weeds.

Sprinkle table salt. It will kill grass and weeds

You have to pull the grass, no matter how much mulch you put down the grass will grow through it

Pulling them out is the safest. Heavily mulch afterwards.

well pull them out