Also, make sure you remove the flowerheads and give them a light application of fertilizer every year after blooming. Also, I've found that those that bloom heavily one year may take a vacation the next, just to build themselves back up. Another thing to consider if these are Asiatic, is that living in Ft. Worth, TX, there is always the possibility of an exceptionally mild winter that can have an adverse affect on Asiatic bud formation at a critical period sometime in the middle of dormancy as the bulb reprograms itself. My relatives in far Southwest Georgia struggle with Asiatics because of this.
