I can only guess. My best guess is you may succeed for the first year or two, but I think the grass mat would eventually be too dense for the daffs. If your client is willing to take the gamble,fine, but I would not want to give her a guarantee. Al

Thanks for the input Calistoga!

Does it get cold enough in your area that the bulbs will have a cool and long enough chill season in the ground?

Will they be planted in an area where the foliage can be left in place for 6 weeks after they have finished blooming...ie not mowed? If the foliage is removed/mowed too soon, the bulbs will not bloom the following season.

Sue