Don’t use galvanized steel cans, which will rust. [2] X Research source A black can will provide added warmth to the soil. If you live in a hot area where the potatoes will get full sun, don’t use a black can or the soil could get too hot.
Depending on the thickness of your trash can, you might be able to create these holes by jabbing a screwdriver or pitchfork through the bottom.
If you’re adding your own fertilizer, the amount you’ll need to use varies depending on the specific product you’re using. Consult manufacturer directions for more information.
You can obtain seed potatoes from your local garden supply shop.
Don’t plant more than one variety of potato in your trash can. Cut your seed potatoes in such a way that each piece has three dimples (or “eyes”). [10] X Research source These small divots or indentations are about 1 to 2 millimetres (0. 039 to 0. 079 in) deep.
The best time to water your potatoes is in the evening and in the morning. This will prevent the water from simply evaporating in the daytime heat. The soil should be damp, not soggy.
This process of continually adding compost is called “mounding. ”[12] X Research source Make sure the leaves are still exposed so they get sunlight. Instead of compost, you could add potting soil. Stop adding soil when you reach the top of the trash can. [13] X Research source
Cure the potatoes for about two weeks.
Don’t store your potatoes more than 6 to 8 inches (15 to 20 cm) high or they might bruise. Check your stored potatoes regularly and remove any that are rotten.
