ok here is a theory. Mine were about 10-12 inches deep when I dug them. They put up foliage in spring when the weather is cooler. I wonder if later in the year, Aug here, when they are supposed to bloom, that the bulbs get too hot in the pot (as opposed to staying cool deeper under the soil) and it stresses them or throws them off somehow so they don't bloom? Maybe they would bloom if they were planted deeper in the ground?