Just keep in mind that our last frost date here is March 15th. Hold off on fertilizing your pruned knock-outs before then to insure that any tender new growth won't push out before the last frost.
Bayer products give results! They were originally developed in Glenview, Illinois by a fellow who grew/field tested new rose breeds for larger companies, in order to make his large fields easier to manage and so we in the Chicago area were the first to try them.
Only problem is that our ground HERE is often faster draining (little or no clay) and so I tend to apply a little, then wait about 1/2 hour and apply more around plants.
The plants seem to utilize more product this way. They get a chance to suck it up before it drains away, hopefully.
Even using 3-in-1 formula (which among other things, helps against black spot), I still defoliated the bottom 8 inches or so of my roses for extra insurance during rains or watering.
