How to Grow Potatoes: Buried Treasure, Step by Step

GardenDraft Team · July 22, 2026 · Updated August 1, 2026 · 8 min read

Part of: Garden Planning Guides · How to Grow Vegetables — Crop Guides A–Z

Few crops feel as much like buried treasure as potatoes. You plant a chunk of potato, ignore it for three months, then dig and find a dozen more. They're genuinely easy: the handful of rules that matter are mostly about light, soil, and not planting them where their relatives just grew.

Start with seed potatoes, not the grocery store

Plant certified seed potatoes — small tubers grown specifically to be disease-free. Supermarket potatoes are often treated to suppress sprouting and can carry disease into your soil. Cut larger seed potatoes into chunks a couple of days before planting, each with one or two "eyes" (the little buds), and let the cut faces dry so they don't rot. Small seed potatoes go in whole.

Early, mid, and late types

The potato catalog sorts by season length, and the split matters more than skin color. Early types finish in roughly 60 to 80 days, size up before summer's blight-and-beetle pressure peaks, and are the smart choice for small gardens and short seasons — but their thin skins don't store long. Midseason types run 80 to 100 days, and late (maincrop) types need 100 days or more, yielding the heavy, thick-skinned tubers that fill a root cellar. Texture is the other axis: dry, floury russet types for baking and mashing; waxy reds and fingerlings that hold their shape in salads; all-purpose yellows in between. A row of earlies plus a row of maincrop covers both the summer kitchen and the winter bin. One heads-up for seed shopping: a week or two of "chitting" — letting seed potatoes sprout stubby green shoots in a bright, cool room before planting — gives earlies a genuine head start.

Cool soil, full sun, loose ground

Potatoes are a cool-season crop. Plant a few weeks before your last frost date, once the soil is workable and around 45°F. The shoots can take a light frost, and you can mound soil over them if a hard freeze threatens. Set seed pieces about 4 inches deep and a foot apart in full sun, in loose soil worked with compost. Skip fresh manure and go easy on lime; potatoes prefer slightly acidic ground.

The catalog window is two to four weeks before last frost, with emerged shoots tolerating brief dips to about 28°F — colder than that, and the mounding trick or a night under row cover saves the planting. Rows run 2 to 3 feet apart to leave soil for hilling; in intensive beds the catalog's square-foot value is 6 inches, which yields plenty of small new potatoes rather than fewer big bakers — pick your spacing to match the potato you want. That slightly acidic preference is doing real work, since it suppresses the scab organism; if you test your soil, don't lime the potato bed. Feeding is front-loaded: compost and a balanced organic fertilizer at planting, one nitrogen side-dress at first hilling, then stop — late nitrogen grows vines at the expense of tubers.

Hilling is the key move

This is the step that defines a potato crop. As the plants grow, mound soil (or straw) up around the stems, leaving just the top leaves exposed, and repeat every couple of weeks. Hilling does two jobs: it gives the plant more buried stem to set tubers along, increasing yield, and — critically — it keeps developing potatoes covered. Any tuber exposed to light turns green and produces solanine, which is mildly toxic. Green potatoes get cut away or composted, so keep them in the dark.

Water follows the hills: keep moisture even from flowering onward, when tubers are actually swelling — an inch or so a week — because drought-then-rain cycles produce knobby, hollow, or cracked tubers. Ease off entirely as the vines start to yellow. Growing under 8 to 12 inches of loose straw instead of soil is a legitimate variant (easier digging, cleaner tubers, more vole risk); it works especially well in no-dig beds, where you simply lift the straw to check progress and steal a few new potatoes without disturbing the plant.

Watch for the usual nightshade trouble

Potatoes share pests and diseases with tomatoes and eggplant, which is exactly why you rotate them — never plant potatoes where any nightshade grew in the last few years (see crop rotation). Patrol for the Colorado potato beetle, whose larvae can strip a plant fast, and for the early and late blight that scorches the foliage.

A few second-tier issues round out the list. Scab — corky rough patches, cosmetic but ugly — points to alkaline or freshly limed soil. Wireworms drill clean holes in tubers, worst in beds converted from lawn within a couple of years. Flea beetles pepper leaves with shot-holes, rarely seriously (controls here). On the prevention side, the companion data has real support for potatoes: bush beans interplanted with potatoes is a long-standing extension recommendation, and mustard-family biofumigant cover crops turned in before planting are documented to suppress scab and Verticillium (cover-crop primer). Keep potatoes away from a strawberry bed's future site, too — Verticillium lingers for years.

Digging: new vs. storage

For tender new potatoes, dig gently a couple of weeks after the plants flower. For full-size storage potatoes, wait until the tops yellow and die back, then leave the tubers in the ground another two weeks to set their skins. Dig on a dry day, brush off the soil (don't wash), and cure them in the dark for a week or two before storing somewhere cool.

Dig with respect for what you can't see: start the fork a foot outside the plant's crown and work inward, lifting the whole root zone rather than stabbing at it, because every speared tuber is one for tonight's dinner instead of February's. Sift the loosened soil with your hands afterward — the biggest potatoes are routinely the ones lurking outside the tidy circle you expected — and leave nothing behind, since volunteer potatoes next year are both a weed and a disease bridge that undermines your careful rotation.

Storage rules are simple but strict: dark, cool, humid, and ventilated — a paper sack or slatted crate in a cellar, never the refrigerator (cold turns starch to sugar) and never anywhere light reaches (full storage guide). Eat the damaged and the greened-and-trimmed first; a well-cured maincrop holds for months. Check the bin monthly and pull anything softening before it spreads — one rotting potato really can take the sack with it. Save no tubers for next year's seed unless disease pressure is low in your garden — certified seed is cheap insurance. Short on ground? Potatoes thrive in grow bags and big containers 15 gallons and up, hilled with added mix as they grow (container methods) — the harvest is as easy as tipping the bag over, and bag-grown spuds sidestep most soil pests entirely. Set your planting date with the planting calendar.