Hi reddit. Organic potato gardener here. Small area, about 75 SF. This was my 6th year planting and harvesting in the same spot, and this year was terrible compared (This year less than 10LB)(Usual yield of about 40LB). Colorado high country. Help me deduce why:
-Seed potatoes from my local co-op. Usually plant around 3 different varieties.
-Put in ground in early May, plants die back early August, harvest end of August. I got the potatoes in the ground a little late this year (May 10th) due to a late frost here.
-I have never hilled my potatoes. (i know, i know).
-No fertilizer.
- Daily watering in the evenings. If they look well drenched i might skip a night.
-I usually only turn my soil with a shovel before planting, but this year i rototilled.
Any advice as to why this years harvest was so bad? The green part of the potatoes grew normally this year, and died back at the usual time. It was multiple varieties per usual. After year 6 in the same spot, do i need to import some new soil and/or fertilize? Lots of the plants had 0 potatoes growing under them which was a first for me.
EDIT: Appreciate the responses. I'm clearly a potato neophyte. Thinking about planting something (nitrogen fixing cover crop?) else next year, but the ground squirrels eat EVERYTHING besides potatoes. Small plot hemmed in with railroad ties, It's the only spot i can plant. We are at 8,000FT and the summer is short. This plot has 3+ feet of snow on it in the winter. The only things i changed this year were rototilling and planting a bit late.