I don't think mine is that tall, however, it is planted in one of the gardens that probably has the worst soil of all of them. Also, it has only been there for two seasons now. I'll bet next year it will be better. I plan to fertilize many of my daylilies next year. It's been a while since I've done that. Other than the Milogranite (did I spell that right?) that I spread mostly to keep the deer away.