Certified GKH Gardening Expert
Your bulbs may have deteriorated if they've been sitting in wet soil over the winter.
You'll need to take one up out of the soil and examine it. If it's mushy, you should take them all out. If they just have a few spots of rot, try cutting away the bad spots and put them out to dry. However, if there's a lot of rotting, you've probably lost the bulbs.
Here's an article that will help: https://www.gardeningknowhow.com/ornamental/bulbs/bgen/flower-bulb-shelf-life.htm