Certified GKH Gardening Expert
Likely, it is disrupt their cycle to plant them now. These need to be planted from September to November, while they are dormant, to give them the proper chill hours. It will give them a chance to complete the rest of this cycle so that it has energy to store for flowering by the fall. You can leave them in ground after that. They prefer much colder, but tolerate our warmer temperatures in zone 7.
https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/daffodil-bulbs-planted-late.htm
https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/dividing-daffodil-bulbs.htm