One of the country mindsets that is too often missing in the city mindset is that of "using it all up."
In that spirit, I took to the internet to find out what to do with horseradish flowers. It turned out that horseradish flowers can be eaten or used to make tea. Horseradish flower tea is used to treat colds and respiratory problems. I can understand why that would work!
The flowers are milder than the root, they say. I haven't tried them yet, but I will, since mine is flowering right now. Some people eat them with beans or meat.
You can eat the leaves, too, and they're a mild version of the root also. Use the young tender leaves and cut them up to put a little bite in your salad or on a sandwich.
Since horseradish roots are not at their best during warm growing weather, the flowers and leaves make a great substitute!