Grow 100 lbs. of Potatoes in 4 Square Feet - Household. Sinfonian’s Square Foot Garden » 2) Build-As-You-Grow Potato Bins. The Seattle Times: Home & Garden: It's not Idaho, but you still can grow potatoes. You don't need your own private Idaho to grow potatoes.
Greg Lutovsky, who has been growing potatoes as a business since 1993, says you can grow 100 pounds of potatoes in 4 square feet. All it takes is some lumber, seed potatoes and careful attention to watering. In Western Washington, potatoes can be planted as late as Aug. 1, with a harvest sometime in November, said Lutovsky.