Bad year for A. tubrerosa?
I had a terrible year with my A. tuberosa this year. I have them in ages from 1-3 years old. Whereas last year, the 1+ yr olds were blooming lushly, approx 3x3', this year they were stunted, barely 8 inches high. On different plants, regardless of age or position in the garden, some of the ends of leaves were shriveled and wrinkled. The 3 yr olds didn't even flower, and hardly grew at all. Anecdotally, the few people I know who were growing them this year as well had similar problems.
It did emerge "early" this year because of the warm weather early on. I'm definitely going to keep pinching it back next year.... But is there another explanation as to why it did so badly this year?