April is the time in Wisconsin to get an early start on your vegetable garden. Besides starting seeds indoors there are several crops that can be planted outdoors right now, like growing potatoes. Potatoes are easy to grow and produce an abundant crop that keeps well. Homegrown potatoes are a healthy alternative to commercial store-bought potatoes, which contain high levels of toxins as a result of being grown in fumigated soil.
Steps for growing potatoes
Start with certified disease-free seed potatoes. Our clients frequently ask us if they can start their potato crop from supermarket potatoes. We do not recommend it. Store-bought potatoes, marketed for eating, have been treated with a growth regulator to delay or eliminate sprouting and are not certified disease-free. Seed potatoes, on the other hand, are grown expressly for planting. They sprout readily and are carefully monitored and inspected to be certified disease-free.
Growing potatoes in the ground
Dig 6”-8” deep trenches in a loose, loamy soil
Root crops will not produce well in heavy clay soil so make sure that you amend your heavy soil or use a light, commercial soil blend
Place seed potato sections, eyes up, at bottom of the trench
Backfill with 4”-6” of soil
When top growth reaches 6”-8” tall, hill soil around the stems so that only the top leaves are visible
Continue this process as the plants grow throughout the season, usually three to four times
Potatoes are ready to harvest 3-4 months after planting. Allow the top growth to wither and die down and then gently dig up the plants with a garden fork (don’t use a spade as you may end up cutting your potatoes).
One delightful feature of potatoes is that they store for long periods if kept in a breathable bag in cool, dry conditions. This allows you to enjoy your garden harvest into the fall and winter months.
Growing potatoes in containers
We love the ease of growing potatoes in containers! It allows those who don’t have in-ground garden space to grow their own food right on their patio or deck. Our favorite method is to grow in a “Smart Pot”. These are reusable, durable, breathable containers that fold up for easy winter storage. Place several inches of a quality light soil mix at the bottom of your Smart Pot and follow the same directions as above. Our favorite part of growing potatoes in Smart Pots is the ease of harvest. Once the top growth matures you can simply dump your smart pot and hand pick out your potato harvest. Easy peasy!
Seed Potatoes at Heyden’s Gardens
Early maturity with moderate yields. Very popular potato with smooth, thin skin and sweet yellow flesh. Ideal for boiling, baking, and frying but can also be used for grilling and roasting.
Dark Red Norland
Early maturity with a moderate yield. Primary use for salads and very good for boiling. Also good for making French fries and potato chips but not good for baking. Excellent storage.
Mid-season maturity with a high yield of large tubers. The white flesh is perfect for frying, boiling, mashing or baking. Considered one of the best potatoes for making French fries and potato chips. Stores well.
A heritage variety (introduced in 1945) with a high yield potential. A popular all-purpose potato with sweet white flesh and thin red skin. Adapted to growing in our heavy clay soils. Ideal for harvesting as new potatoes and perfect for light and fluffy mashed potatoes. Good long-term storage.