These were planted last year. They usually bloom in early May, and continue to bloom for several weeks. Last year I only had 1 or 2 bloom, this year, I have more than a dozen blooming now. I read an article in Southern Living about them, and it said they usually need a couple of years to begin blooming well. I have these planted in 4 different places, all fairly shaded except for the ones in the front yard, which are doing best. The ones that get the most afternoon shade aren't doing nearly as well. Out of 8 plants, only 2 are blooming. In New Orleans, there are a lot of them blooming, usually in shady yards. I haven't been growing these long enough to know the secret. I watered them well with Miracle Grow early in the Spring, but I can't explain why some of them are blooming and others not.