The same thing happens with tulips and daffodils. After bloom it seems like it takes for ever for the foliage to yellow and then brown and can be removed. DLs have a few problems.......Deadheading, browning foliage Etc.. I still love them and have planted quite a few this summer and may get more.We don't all need to like the same thing. I dislike orange marigolds. Gladiolus are only pretty for 3 or 4 days. I find larkspur weedy..........a trite phrase.." to each his own" Happy gardening Clint.