I have often read that planting daylilies too deep will cause them not to bloom. I just read one example that stated when the plant was dug up it was found to have two crowns(one stacked on top of the other), and that all the energy went into creating the second crown so it did not bloom. The reason for the second crown was said to be because the plant was too deep, and the plant was too deep because of repeated applications of mulch too close to the plant. In other words the plant was not planted too deep but the soil was slowly built up around the plant. I can see that could easily become a problem for me being I am a heavy applier of mulch. I have also had plants that seem to pull themselves down deeper, and I made special efforts in some locations to plant very shallow and allow the plants to work themselves deeper. I have thought about placing a small pile of gravel directly under the plant in a mond form to see if that would prevent the plants from going deeper, but have never actually done it. I have read plants in sandy or soft soil often pull themselves deeper.
