I wish the rain hadn't ruined my blooms because I has so many this morning! The grey, the pinks, the windmills and the lilacs, I had at least two of each.
RE fertilizer, I used a granulated tomato that is 3-4-4. That seems to be what they like. I also have areas where worm castings are on the top of the ground, so I scoop them up and dump them in all my pots. I've been plagued with rust and other leaf diseases this year. I was spraying with copper and that was having no effect. I ran out of the liquid so I used the powder and just sprinkled the leaves. Either that or the long hot dry spell has cleared up most of the leaves and they are much healthier now,