I am sorry for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
You don't need to cut back the foliage. Some bulbs repeat bloom well in some area and some do not. I would not think that dividing is needed at this time. In fact some bulbs bloom best when they are a bit more crowded. You might try moving them to another area with more sun if they are not getting a lot now.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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