Compost is pretty much compost, though personally I prefer to avoid manure. Rake up any leaves in the yard to make leaf mold and save grass clippings in a separate compost for plants that need a boost of nitrogen.
What you need to look into is what soil type and what kind of fertilization are best for the flowers. I don't grow those, so my only recommendation would be to save your banana peels and make "tea" that you can then spray on the plant as a liquid fertilizer. I use it (diluted) on all my fruiting and flowering plants and they are all doing very well.
You can pour off a bit of the liquid to use now and let the rest steep a few more days. You only need a few ounces in a spray bottle anyway, (fill the rest of the way with water) and a full bottle will last for quite a bit. I have a bunch of stuff pinned about using banana peel as fertilizer: http://pinterest.com/cdgautreaux/great-growing-ideas-and-tips/
LOL, I was just thinking that same thing earlier. I could swear I'd read someplace that the smell was not that bad. Hopefully the garden pests dislike the smell as well The plants seem to like the spray however, so that's what's important. I just have to be careful that the wind doesn't blow it back at me.
Oh, you definitely want to wash it or any other homemade spray off just as you would a commercial spray. Just realized you were originally asking after a commercial compost product. Why not start your own? In the meantime, check around for community garden programs or local farmer's markets to see who might be offering organic compost in your area.
Also, if you compost with worms you will see the results a lot faster. You can use a little of the compost you have on hand to start your own. That way you have control over what materials are in the soil for your plants. (For instance, I don't really want a product with manure.)