Linda,
Sorry I forgot to check on this thread...I had mine for 3 years and it didn't do much. Then I moved it, and it must like where it's at now! It's been in this spot now for several years and has grown to be a large plant. I divided it last year and it's looking really nice again this year. I just use 10 10 10 fertilizer in the spring and give it plenty of water throughout the growing season.