Not a farmers marketer here but... potatoes don't have to bloom to produce.
I planted mine Valentines day which is the standard in this area. I planted a raised bed of them. As the plants grew, I added oak leaves. I found the potatoes grew in the soil and the oak leaves only served to help retain moisture.
I dug one fourth of this 2' x 8' bed last weekend and had over two dozen potatoes. My plants never bloomed. I need to finish digging the potatoes so the bed can be replanted but guess I will need to can the potatoes as I can't eat that many that quickly.
http://canninggranny.blogspot....
The local farmers market had lots of sellers and more buyers but not much fresh produce to sell yet. Yard eggs, house plants, last years pecans and such like.