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How to grow Potatoes & Onions

NEW FOR 2022

POTATO SEEDS & ONION SETS!

Growing Potatoes

Cutting Tubers

Some seed tubers are small, whole potatoes, one to 1¼ inches in diameter. These are ideal, since you do not need to divide them.

Cut larger tubers into 1¼-inch chunks.
Every piece must have at least one “eye,” an indentation that will produce the new shoot. Two or three eyes per piece is better.
Use a clean knife on a clean cutting board when you cut the seed tubers into pieces.
Place the cut pieces on a tray at room temperature (between 60°F and 70°F) for a few days until the cut surface has dried out and formed a tough protective layer.
If sprouts start to form, be careful not to rub them off while planting.

Planting Seed Pieces

Plant seed pieces as soon as the soil warms. This period is early April in the Twin Cities area of Minnesota. Gardeners in southern Minnesota may plant earlier, while locations further north may not have warmer soil until May.

Plant seed pieces cut side down, 10 to 12 inches apart and about three to five inches deep, in rows 30 to 36 inches apart.
Space pieces closer for smaller tubers and farther apart for fewer but larger tubers.
Cover with four inches of soil or compost.

Hilling

Once the green shoots emerge, hill soil up along plants as they grow. Tubers will form on thin stems, also called stolons, which emerge from the main stems. The longer the underground portion of the plant, the more stolons the plant may grow. Hilling also keeps any shallow tubers from exposure to light and turning green.

Start hilling the plants when stems are about a foot tall, and once or twice more during the growing season. At the end of the season, you will have hilled six to eight inches of soil in total along the plants. Some gardeners plant the seed tubers in shallow trenches to make hilling easier. Instead of mounding soil up, they push it more into the trench.

How to Plant Onion Sets

Bury onion sets 2 to 6 inches apart, gently pressing them into loose soil no more than 1 inch deep. ...
Space transplants 4 to 5 inches apart and rows 12 to 18 inches apart.
Set the bulbs with the point end up. ...
Mulch with straw between rows to help retain moisture and control weeds.