Q.Paperwhites Are Starting To Bloom In Perennial Garden, The Buds Dry Up And Don’t Flower
The plants are healthy and come back every year
Certified GKH Gardening Expert
This, usually, happens when the nutrient ratios of the soil are off. Usually, too much nitrogen.
In your case, I am going to say climate! Paperwhites are a very specific type of Daffodil that will not do well below zone 8. You are in zone 5, so you will probably need to choose a different variety of Daffodil. Once you do, they will likely flourish.
https://www.gardeningknowhow.com/ornamental/bulbs/paperwhites/growing-paperwhites-outdoors.htm
https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/daffodil-buds-dont-open.htm