Answer: Plant them now. Daylillies are fairly tough and I think they'll be fine, but it might be a while before they forgive you!
First, trim away any dead foliage. Then work some compost into the soil at their planting site. After planting, water them in well. Apologize to them profusely and promise them lots of attention and praise. They should get over it and be on their way.
Good luck with your plants!
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