Many rose growers use alfalfa tea made from alfalfa pellets or meal. Or the pellets can be used as is.

There is lots of info on the internet about the benefits of alfalfa as a fertilizer. One company's analysis at the link below.

Here is a link that might be useful: analysis of alfalfa pellets

Nutrients in the soil need to be in balance and if a good soil test indicates this is si adding some kind of "fertilizer" could cause an imbalance that could make the plants more susceptible to insect pests and plant disease.
Why do you think those plants need more of a faster acting "fertilizer"?

check put the Fertrell company, they have Organic pelleted fertilizers, including some specifically for roses. I have been using their pelleted fertilizers for my market garden for several years with great results.

Compost is great stuff but it is not a complete plant/soil food, especially if you make you own. If it is not tested it for nutrients than you don't know what is actually in the compost and it could be horribly deficient in the things your soil needs as far as fertility os concerned. But compost will always do good things like add organic matter and loosen clay soils and bolster sandy soils.

Here is a link that might be useful: Fertrell Company

[I]Why do you think those plants need more of a faster acting "fertilizer"?[/I]

It was suggested to me by a master rosarian that after the brutal winter we had here my roses would benefit by a "pick me up" this Spring.

I have a small farm. I regularly do soil tests on both the gardens and the pastures. In 6 years they all have come back with the recommendation to only add nitrogen. They also always show high phosphorous. It doesn't seem to matter if the test is from the pastures or the compost amended gardens.

Even though past tests have come back suggesting nitrogen, the only addition the gardens have gotten has been plenty of compost. Having rich clay soil the biggest benefit from the compost seems to be improved tilth and drainage. I've not been unhappy with the results, but I had already been thinking about experimenting with additional fertilizer this year when I got the suggestion last week from the rosarian.

I don't have time to do more soil tests at the moment, but thought using the 6 years of compiled info might work. Seems to me lots of folks don't test, fertilize, and things work out ok...

I asked this same question in the Roses forum but thought there might be some prevailing wisdom in this forum concerning the use of compost and how or if it might typically need anything to balance things.

The comment regarding the addition of alfalfa is dead on!! Alfalfa meal/alfalfa tea is highly recommended for rose gardening - pretty much any organic rose fertilizer will contain alfalfa in some form. It contains a natural growth hormone that roses process well, encouraging very healthy growth and the development of basal caning. Alfalfa is considered to be a nicely reliable and relatively fast acting organic source of nitrogen.

More often than not I have seen a recommendation on a soil test that 2 pounds of Nitrogen per 1,000 square feet be added to a garden, and that is a fairly minimal amount and most likely not really needed anyway. Keep in mind that a plant growing in soils with excess N can have problems related to that, such as Aphids, more so then plants growing in soils with all nutrients pretty well balanced.
Yes. adding N to the soil will give you lusher, greener growth but is that really necessary or even desirable?

I don't know of a product with N and K but no P, but it sounds like your tests come back with adequate K. I would stick to the nitrogen for a spring pick-me-up, in which case you want either ammonium nitrate or urea. Should be able to find them at a garden supply.

Since many states are restricting the use of "fertilizers" containing Phosphorus (P) due to the Phosphorus pollution of lakes and ponds that is allowing the growth of toxic algae there are many "fertilizers" that no longer have any P in them. In Michigan you theoretically need a soil test report to purchase a "fertilizer" that contains P.