Choose a sunny spot in your yard, garden or on a patio or balcony. Stack two or three tires and fill them with damp earth and compost to just over half the depth of the stacked tires. Then place 4 or 5 seed potatoes in the stack, about 2 inches deep, with the eyes or shoots facing up.Click to see full answer. Beside this, how many potatoes can you plant in a tire? Plants Per Tire When planting potatoes in old tires, you need to leave enough room for the plants to develop properly. When using an old car tire, you can safely plant three to four potatoes per tire. Each plant yields about five to 10 potatoes.One may also ask, how do you grow the best potatoes? Best for Wet Yards: Wire Cylinders Put several inches of soil in the bottom, then plant three or four seed potatoes and cover them with 3 inches of soil. Continue to add soil as the potatoes grow. To harvest, lift the cylinder and pull the soil back to expose the tubers. Regarding this, is it safe to grow potatoes in tires? The short answer is that yes, they are. Tires contain a host of chemicals and metals that should not be in the human body. And they do gradually erode and break down, leaching those chemicals into the environment. After all, it’s a common practice in many places to grow potatoes in tires.How do you plant potato towers?Then begin filling your potato tower with a foot of soil. Arrange your seed potatoes around the edges about 3-4 inches from the edge and about 6 inches apart. Be sure to point the eyes outward as the plants will be growing out the side of the tower. You should be able to use 4-6 seed potatoes per layer.