Why Aren't my Irises Blooming?

If your irises aren't blooming, there are many reasons that could be to blame. Some of these include: Time - irises require at least a year to become adequately established before they will start blooming. Lack of sun - they need six hours of direct sunlight daily to bloom well. Overcrowding - if the clump becomes too crowded, it may need to be divided before it will bloom. You can find more information at http://faq.gardenweb.com/faq/lists/iris/...