I have several hemerocallis, but they seem to be reluctant to flower. They were the same for the past couple of years so last year I divided them but this year they still have not produced flowers. The most common variety has flowered but the more particular named ones have not. Any suggestions would be appreciated. I seem to have this problem in general that the plants grow well but don't produce as much flower as I would expect. The soil is quite heavy over chalk and I generally only feed with chicken pellets in spring and any compost we can make which is not enough for the whole garden at any one time.