Don't answer those posts like Make Money online"

I guess I'll try to answer this although I am not an expert. I do know you need to pull your mulch back and
sprinkle the fertilize on the ground and then water it
in. Then replace the mulch.
As far as what kind of fert. to use there's one called Rosetone or you can use a balanced fert like 10-10-10. That's what our local rose society suggests. Check this link www.chattanoogarose.org

When the leaves on your roses get to the size of the first joint on your pinkie finger, it is time to apply that first fertilizer application. Any well-balanced granular, non weed and feed, fertilizer will do. You can go with 10-10-10, 15-0-15 or you can apply a soluble fertilizer at the rate of 1 Tbsp sprinkled around the bush and watered in. Miracle Gro or Miracle Gro for Roses or any of the others will be fine. Vary what you apply, because roses are heavy feeders and will accept anything just as long as they get fertilized once a month after that initial application. Continue the once a month thing throughout the blooming season.