I have a weed that is hard to get rid of. I have put out weed and feed

what weed and weed and feed is a fertilizer

Is this a single weed or an all thru your lawn weed or a climbing your shrubs weed?

What is the weed your trying to eradicate? if you don't know take a piece of it to the store, and ask for the right type of herbicide.

Weed and feed is not a "cure all" for every problem. Sometimes you just need to dig them out by hand or use other methods. Take a sample of the weed in a plastic zip lock bag to a reputable nursery for proper identification. Then try what they suggest.

Salt will kill weeds. But use it with caution because salt will kill anything it touches.

Sometimes you just have to dig them up.