There is a moment in potato growing that no other vegetable can match. You push a garden fork into the soil, lever upward, and a cascade of potatoes tumbles out — clean, firm, golden or red or purple, in sizes ranging from marbles to fists. It is like digging up buried treasure, and it never gets old. Every single potato in that pile grew from a single seed potato you planted a few months earlier. That kind of multiplication — one potato in, ten to fifteen potatoes out — is uniquely satisfying.
Raised beds are excellent for potatoes because they give you control over two things potatoes care deeply about: soil quality and drainage. Potatoes need loose, well-drained soil that they can push through as they form tubers underground. Compacted or waterlogged soil produces small, misshapen tubers and increases the risk of scab, rot, and other soil-borne diseases. In a raised bed, you build the ideal growing medium from scratch and never have to fight against native clay, rocks, or poor drainage.
The other advantage is hilling. Potatoes form tubers on the buried portion of the stem above the original seed piece, so the more stem you can bury during the growing season, the more tubers the plant produces. In a raised bed, you start by planting seed potatoes in a trench at the bottom and gradually add soil as the plants grow — effectively using the bed as a slowly filling container. It is an elegantly simple system that maximizes yield in a small footprint.
Seed Potatoes vs Grocery Store Potatoes
You can technically plant a potato from the grocery store and it will probably grow, but there are good reasons to buy certified seed potatoes instead. Grocery store potatoes may have been treated with sprout inhibitors that delay or prevent growth. They have not been inspected or certified free of diseases like late blight, ring rot, or blackleg — diseases that can persist in your soil for years once introduced. And grocery potatoes are a limited selection of commercial varieties bred for shipping and storage, not necessarily for garden performance or flavor.
Certified seed potatoes are grown specifically for planting, inspected for disease, and available in dozens of varieties selected for flavor, yield, disease resistance, and growing characteristics. They cost more per pound than grocery potatoes, but the investment is small relative to the yield — one pound of seed potatoes produces eight to ten pounds of eating potatoes under good conditions. Buy from reputable seed potato suppliers who certify their stock as disease-free.
Each seed potato should be roughly the size of an egg — about two ounces. Larger seed potatoes can be cut into pieces, with each piece containing at least one or two "eyes" (the small buds on the potato surface where sprouts emerge). Cut seed potatoes a day or two before planting and let the cut surfaces dry and callus over at room temperature. This callusing prevents rot organisms in the soil from entering through the fresh-cut surface. Small seed potatoes (egg-sized or smaller) should be planted whole without cutting.
Chitting: Starting Sprouts Before Planting
Chitting is the practice of encouraging seed potatoes to sprout before planting. It gives the tubers a head start and can advance your harvest by one to three weeks — a meaningful advantage in short-season climates or when you want the earliest possible new potatoes.
Four to six weeks before your planned planting date, set seed potatoes in a single layer in egg cartons, shallow trays, or cardboard boxes with the end containing the most eyes facing upward. Place them in a cool (fifty to sixty degrees Fahrenheit), bright location — a windowsill, an unheated porch, or a bright garage. Avoid warm, dark locations, which produce long, pale, fragile sprouts that break off during planting. You want short, stubby, green or purple sprouts — ideally half an inch to one inch long — that are sturdy enough to survive handling and planting.
When it is time to plant, handle chitted potatoes carefully. Those sprouts are your head start — each one will become a stem, and each stem is a potential tuber-producing structure. A chitted seed potato with three or four sturdy sprouts has a genuine advantage over an unchitted potato that has to spend its first two to three weeks underground just getting started.
Chitting is optional, not mandatory. Potatoes grow perfectly well without it. But if you live in a climate with a short growing season, if you want the earliest possible harvest, or if you simply enjoy the anticipation of watching sprouts develop on a windowsill while waiting for the soil to warm, it is a worthwhile practice.
Determinate vs Indeterminate: Understanding How Potatoes Grow
This is one of the most misunderstood concepts in potato growing, and getting it right significantly affects your hilling strategy and yield expectations.
Determinate potatoes set all their tubers in one layer, relatively close to the seed piece. They grow to a fixed height, flower, set tubers, and die back on a predictable schedule. Hilling is still beneficial for weed suppression, preventing green tubers, and keeping the soil loose around the developing tubers — but piling soil twelve inches up the stem will not produce additional layers of potatoes. Most early-season and many mid-season varieties are determinate. Yukon Gold, Red Norland, and Caribe are determinate types.
Indeterminate potatoes continue to set new tubers along the buried stem as you hill soil up around the plant. They grow taller, produce more foliage, take longer to mature, and have the potential for significantly higher yields if you hill aggressively. The classic technique of planting in a deep trench and gradually filling it as the plant grows is designed for indeterminate varieties. Late-season varieties are often indeterminate. Russet Burbank, German Butterball, and Canela Russet are indeterminate types.
The practical implication for raised bed growers: if you are growing determinate varieties, hill two or three times and then stop — additional hilling does not increase tuber production. If you are growing indeterminate varieties, keep hilling until the plant reaches the top of the bed or the foliage stops growing, because every inch of buried stem is a potential tuber-producing zone.
Planting and Hilling Technique in Raised Beds
Plant seed potatoes when the soil temperature reaches forty-five to fifty degrees Fahrenheit, which corresponds roughly to two to four weeks before the last expected frost date in most areas. Potatoes tolerate light frost on their foliage — it will nip the leaves but the plant regrows quickly from below ground. In a raised bed, soil warms earlier than in-ground gardens, so you may be able to plant a week or two ahead of the general calendar.
Start by digging a trench or individual holes six to eight inches deep in your raised bed. If your bed is twelve inches deep, this means planting in the bottom half. Space seed potatoes twelve inches apart within the row and leave eighteen to twenty-four inches between rows. For a four-by-eight raised bed, two rows of eight potatoes each (sixteen total) is a practical layout that leaves room for hilling.
Place each seed potato in the trench with the sprouts (or eyes) facing upward. Cover with three to four inches of soil and water gently. Do not fill the trench to the surface yet — you need that space for hilling.
When the green shoots emerge and reach six to eight inches tall, hill them. Pull soil from the surrounding bed surface and mound it around the stems, burying all but the top two to three inches of green growth. This accomplishes three things: it buries more stem for potential tuber production, it covers any tubers forming near the surface to prevent them from turning green, and it loosens the soil around the growing zone so tubers can expand freely.
Hill again when the plants have grown another six to eight inches above the soil. Continue this process until the soil is level with the top of the raised bed. For indeterminate varieties, you can add additional soil or compost on top of the bed edges if your bed walls allow it, effectively increasing the bed depth during the growing season.
Some raised bed growers use a modified approach: plant the seed potatoes directly on the ground surface (or on a few inches of compost below the bed), then fill the bed gradually from empty as the plants grow. This maximizes the available hilling depth and works especially well with tall bed walls or stackable bed systems.
Variety Selection by Season
Early season (60-80 days): These varieties mature fastest and produce the first new potatoes of the year. The tubers are smaller, thin-skinned, and incredibly tender and sweet when eaten fresh. Red Norland (smooth red skin, white flesh, reliable and widely adapted), Caribe (purple skin, white flesh, floury texture, excellent mashed), and Yukon Gold (yellow skin and flesh, buttery flavor, the gold standard for early potatoes). Early varieties are mostly determinate, so do not expect additional tuber layers from aggressive hilling.
Mid-season (80-100 days): These produce larger tubers than early varieties while still maturing in a reasonable timeframe. Kennebec (white skin, white flesh, outstanding all-purpose potato, excellent disease resistance), Gold Rush (russet skin, white flesh, great baking potato), and French Fingerling (pink skin, yellow flesh with a red ring, waxy and exquisite roasted). Mid-season varieties are a mix of determinate and indeterminate types.
Late season (100-130 days): These take the longest but produce the largest tubers and the highest total yields. They are the best storage potatoes — thick skin, dense flesh, and high starch content that keeps well for months. Russet Burbank (the classic Idaho baking potato, indeterminate, responds well to deep hilling), German Butterball (yellow flesh, extraordinarily rich and buttery flavor, excellent keeper), and Elba (large round tubers, outstanding blight resistance, reliable in humid climates). Late varieties need a long season — count backward from your first fall frost to make sure you have enough growing time.
Use our yield calculator to estimate your expected harvest based on the number of plants and your variety type. A reasonable expectation is eight to ten pounds of potatoes per plant for early varieties and twelve to fifteen pounds per plant for late-season indeterminate varieties grown with good hilling technique.
For something visually striking, try purple and blue potatoes — All Blue, Purple Majesty, and Adirondack Blue produce deeply colored tubers that hold their color through cooking. They look stunning roasted, in potato salad, or mashed alongside their yellow and white counterparts. The flavor is excellent — nutty and rich — and they contain higher levels of anthocyanin antioxidants than white or yellow varieties.
Growing Season Care
Potatoes are relatively unfussy once planted. They need consistent moisture — one to two inches per week — particularly during tuber formation, which begins roughly when the plants start to flower. Drought stress during this critical period reduces tuber size and can cause internal defects like hollow heart (a cavity inside the tuber). In raised beds, soil dries faster than in-ground, so monitor moisture carefully and irrigate before the plants show stress.
Stop watering once the foliage begins to yellow and die back. The tubers are maturing and curing in the soil at this point, and excess moisture increases the risk of rot. Let the soil dry out gradually as the plants senesce.
Fertilize at planting with a balanced, lower-nitrogen amendment. Too much nitrogen produces massive vines with small tubers — the plant pours its energy into top growth at the expense of the underground harvest. Side-dress with compost or a potassium-rich fertilizer (wood ash is a good organic source of potassium) at each hilling. Potassium supports tuber development and skin quality.
The most serious potato disease for home growers is late blight — the same disease that caused the Irish potato famine. It thrives in cool, wet conditions and can destroy a crop in days. Watch for dark, water-soaked spots on leaves that spread rapidly and develop white fuzzy growth on the undersides. If you see it, cut and remove all affected foliage immediately and do not compost it. Good air circulation (avoid overcrowding), proper spacing, and growing resistant varieties are your best defenses.
Colorado potato beetle is the most common insect pest — both the orange-and-black striped adults and their reddish-orange larvae feed voraciously on potato foliage. Hand-pick adults and larvae daily in small gardens, checking the undersides of leaves for clusters of bright orange eggs and crushing them. Straw mulch around the plants encourages ground beetles and other natural predators that feed on potato beetle larvae.
Harvest Timing and Technique
Harvest timing depends on whether you want new potatoes or storage potatoes — and the difference between the two is timing, not variety.
New potatoes are any variety harvested young — typically about two to three weeks after the plants flower. They are small, thin-skinned, incredibly tender, and have a sweet, fresh flavor that storage potatoes cannot match. To harvest new potatoes, reach into the soil near the base of the plant and feel for tubers. Pull out a few of the largest while leaving the plant intact to continue growing and producing. This is called "robbing" the plant, and it lets you enjoy new potatoes while the rest of the crop continues to size up.
Storage potatoes are harvested after the vine dies back completely — the foliage yellows, then browns, then collapses. Wait two weeks after the vine is fully dead before digging. This waiting period allows the tuber skins to set — they thicken and toughen, which dramatically improves storage life. A potato dug before the skin has set will scuff and bruise during handling and will not store well.
To harvest, use a garden fork rather than a spade. A spade cuts clean through potatoes with alarming regularity. Push the fork into the soil twelve inches from the base of the dead vine, lever upward, and gently turn the soil over. Work around the plant from all sides, digging progressively closer to the center. Most tubers are concentrated within a twelve-inch radius of the stem. Dig carefully and dig deep — potatoes hiding at the bottom of the hill are easy to miss and will sprout next year as volunteers if left behind.
Harvest on a dry day if possible. Lay the potatoes on the soil surface for an hour or two to dry — this makes cleaning easier and helps begin the curing process. Handle potatoes gently; damaged skin shortens storage life. Set aside any potatoes you accidentally puncture with the fork and use those first since they will not store well.
Curing and Storage
Curing is the step that transforms fresh-dug potatoes into long-storage potatoes. Place unwashed potatoes in a single layer in a dark, well-ventilated space at sixty to sixty-five degrees Fahrenheit and eighty to ninety percent humidity. A garage, basement, or covered porch works well. Cure for ten to fourteen days. During this period, minor skin injuries heal, the skin thickens further, and sugars convert to starch, which improves storage quality and cooking characteristics.
After curing, move potatoes to long-term storage. Ideal conditions are dark, forty to forty-five degrees Fahrenheit, and eighty-five to ninety-five percent humidity. A root cellar, unheated basement, or spare refrigerator set to its warmest setting all work. Store in burlap sacks, paper bags, or cardboard boxes — never in plastic, which traps moisture and promotes rot. Do not store potatoes near apples or other fruits that produce ethylene gas, which causes premature sprouting.
Check stored potatoes monthly and remove any that show signs of rot, sprouting, or shriveling before they affect their neighbors. Well-cured, properly stored potatoes keep for four to six months — long enough to eat your own potatoes from the October harvest well into February or March. Late-season varieties with thick, russeted skins store the longest. Thin-skinned early varieties are best eaten within a few weeks of harvest.
Use our soil calculator to determine how much growing medium you need to fill your raised bed for potato growing, accounting for the additional depth you will want for proper hilling.
Frequently Asked Questions
Can I use potatoes from the grocery store as seed potatoes?
You can, but it is not recommended. Grocery potatoes may carry soil-borne diseases like late blight, scab, or ring rot that do not affect the eating quality but can persist in your soil for years once introduced. They may also have been treated with sprout inhibitors that delay or prevent growth. Certified seed potatoes cost slightly more but are inspected, disease-free, and available in far more varieties than the grocery store offers. The small investment protects your soil and your future harvests.
How many potatoes will one plant produce?
A single potato plant typically produces eight to fifteen tubers, totaling three to five pounds for early varieties and five to eight pounds for late-season varieties grown with good hilling technique. Yield varies significantly with variety, growing conditions, and hilling. Indeterminate varieties hilled aggressively can exceed ten pounds per plant. A sixteen-plant raised bed can reasonably yield fifty to eighty pounds of potatoes — enough to make a real dent in your grocery needs for several months.
Why are some of my potatoes green?
Green coloring on potatoes is caused by exposure to light, which triggers chlorophyll production and, more importantly, the formation of solanine — a toxic glycoalkaloid. Green potatoes taste bitter and can cause illness if consumed in large quantities. Prevent greening by hilling soil over tubers as they develop, maintaining a thick mulch layer, and storing harvested potatoes in complete darkness. If you find green potatoes at harvest, peel them deeply to remove all green tissue or discard them entirely if the greening is extensive.
What is the difference between hilling with soil and hilling with straw?
Both methods work but produce different results. Soil hilling is the traditional method — you mound soil around the stems to bury more of the plant and create a deep growing zone for tubers. Straw hilling uses thick layers of straw instead of soil, which is lighter and easier to work with but can harbor slugs and does not provide the firm support that soil does. Potatoes grown under straw are easier to harvest — just pull the straw aside instead of digging — but yields are sometimes lower because the tuber zone is less stable. In raised beds, soil hilling is generally more practical because you have a finite soil volume to work with and straw adds bulk without adding growing medium.
When is it too late to plant potatoes?
Count backward from your expected first fall frost. Early varieties need sixty to eighty days, mid-season varieties need eighty to one hundred days, and late-season varieties need one hundred to one hundred thirty days. Add two weeks for curing in the ground after vine die-back. If you do not have enough frost-free days remaining for your chosen variety to mature, it is too late. In most climates, the last practical planting window is late June to early July for early varieties. Late varieties should be in the ground by mid to late May to have time to mature before fall frost.