Certified GKH Gardening Expert
You can go ahead and dig them up, if you wish, but this may not be necessary. There can be other reasons for non-blooming in daffodils. In warmer areas, they do not get enough cold temperatures to be able to form a bud. They need 6-8 weeks of temps below 40F in order to form a bud and then flower in the spring. Therefore, it may be that this year they did not get enough cold weather (if you are located in a warm region). Here is more information: https://www.gardeningknowhow.com/ornamental/bulbs/bgen/how-to-plant-bulbs-in-the-south.htm
If you feel this is not the case, the other possibility is that the ground is lacking phosphorus. Without phosphorus, the bulbs cannot form a bud as well. Here is more information on that:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm
