I have several pots of Geraniums that haven't been repotted in a couple
of years. I just sprinkle them with a little Miracle Gro. Right now
they are blooming like crazy.
I live in Northern California. Our plants, trees, and bushes, are just
now coming out of the long belated Winter we had.
I saw that there was snow last week in New York. . .So it may be the
weather that is affecting your's.