Russet potatoes are the classic baking potato — long, brown-skinned, with dry, floury flesh that fluffs up beautifully in the oven and fries into crisp chips. They are the most widely grown potato in North America for good reason: heavy-yielding, good keepers, and reliable in the ground. They are also a long-season potato, taking 90–120 days, so they need a full summer and a little patience.
Potatoes are grown from seed potatoes, not true seed, and russets are planted as chitted tubers in spring, earthed up as they grow, and dug when the tops die back. The work is mostly earthing up and watering, and the harvest is one of the most satisfying in the garden: a forkful of soil that turns up a cluster of big brown tubers. This guide covers chitting, planting, earthing up, watering, and the curing that makes russets store for months.
Russet Potatoes at a glance
| Growing factor | What this crop needs |
|---|---|
| Sun | full sun |
| Soil pH | 5.0–6.0 |
| Days to germination | 14–28 |
| Days to maturity | 90–120 |
| Spacing | 12 inches |
| Water needs | moderate |
| Cold tolerance | frost-tolerant |
| Family | Solanaceae |
Starting seeds
Russet Potatoes is sown directly where it will grow — it does not take kindly to being moved. Sow into prepared, raked soil and keep the seedbed evenly moist until germination, which takes 14–28 days. Sow in short rows and thin the seedlings to the final spacing once they are big enough to handle. Our seed-spacing calculator works out how many seeds you need for your bed.
This crop tolerates frost, so the season is generous: in Zones 3–5 plant in early spring as soon as the soil can be worked; in Zones 6–8 plant in spring and again in late summer; in Zones 9–10 plant through autumn and winter; and in Zones 11–13, which are frost-free, grow it through the cooler months with afternoon shade. Check your dates with our frost-date calculator or the last-first frost lookup — and when in doubt, ask your local extension service.
Russet potatoes are not grown from seed — they are grown from seed potatoes, small tubers saved for planting. Chit them first: set them in a light, cool place with the eyes uppermost for a few weeks until short, sturdy sprouts appear.
Transplanting and planting out
There is no transplanting step for Russet Potatoes — it is sown in place and thinned instead. Once seedlings have two or three true leaves, thin them to their final spacing of 12 inches apart, pulling the weakest and leaving the strongest. Thin on a calm, cool day and water the row afterwards so the remaining seedlings settle back in. Thinning feels wasteful, but crowded plants stay small and are far more prone to pests and disease. Our plant-spacing calculator shows how many plants fit your bed at 12-inch spacing.
Soil and feeding
Russet Potatoes grows best in soil with a pH of 5.0–6.0, so test your soil before you plant — a cheap test kit tells you more than guessing ever will. Work in plenty of compost or well-rotted manure to improve structure and feed the soil life, and make sure the bed drains freely. Our soil-volume calculator and raised-bed soil calculator work out how much soil or compost your bed needs.
Feed generously through the season: work compost into the bed before planting and side-dress with a balanced fertiliser once plants are growing strongly. Hungry fruiting and leafy crops repay feeding with visibly bigger harvests, but too much nitrogen gives leaf at the expense of fruit, so follow the label. Our fertiliser calculator works out how much to apply.
Russets like a slightly acid soil — pH 5.0–6.0 — which also helps keep potato scab down. Dig in plenty of compost before planting, but avoid fresh manure, which encourages scab.
Watering
Water evenly and avoid letting the soil swing between soaked and bone dry. A deep soak once or twice a week beats a daily sprinkle, because it encourages roots to grow down where the soil stays cooler and moister. Mulch helps enormously here, holding moisture and keeping the soil temperature steady. Our watering calculator gives a starting point for your bed size and soil, and the watering schedule generator can build a routine around it.
Sunlight and temperature
Give Russet Potatoes full sun — at least six hours of direct sun a day, and more is better in most zones. Sun drives flavour and yield in this crop, and plants in shade stay leggy and unproductive. Our sunlight calculator can check whether your spot gets enough sun.
It is frost-tolerant and will shrug off light frosts, which can even sweeten the harvest. Hard freezes will still damage it, so cover with fleece if a hard frost is forecast, and in cold zones treat it as a spring and autumn crop rather than a winter one.
Pests and diseases
The pests and diseases to watch for with Russet Potatoes are aphids, hornworms, flea beetles and whiteflies.
Aphids cluster on tender new growth and under leaves, sucking sap and leaving sticky honeydew.
Hornworms are big green caterpillars that can strip a plant overnight.
Flea beetles chew tiny shot-holes in young leaves.
Whiteflies cloud up from the undersides of leaves when disturbed.
Prevention beats cure: rotate crops so the same family does not grow in the same bed year after year, clear debris at the end of the season, and inspect the undersides of leaves weekly. Our pest identifier helper can help you name a pest from its damage, and the plant-disease checker can narrow down a leaf problem.
Companion plants
Good companions for Russet Potatoes are marigolds, basil, onions and lettuce.
Marigolds are the classic companion: their roots and scent deter several soil pests, and their flowers bring in pollinators and beneficial insects.
Basil is said to improve the flavour of its neighbours and its scent confuses some pests; it also makes good use of the same sunny, well-watered bed.
Onions help mask the scent of their neighbours from pests, and their upright leaves take little light from the plants beside them.
Lettuce is a shallow-rooted, quick crop that fills the gaps between taller plants without competing hard for nutrients.
Plant companions in the same bed rather than in a separate corner — that is how they do their work. Our companion-planting finder can suggest more pairings for your bed.
Harvesting
Russets are ready about 90–120 days after planting, when the tops yellow and die back — that is the signal the tubers have finished growing. Wait a week or two after the tops die so the skins set firm, then dig on a dry day with a fork, working from the edge of the row so you do not spear the tubers. Lift carefully and let the tubers dry on the soil surface for a few hours before gathering them.
Cure russets for a week or two in a cool, dark, airy place before storing, and then keep them in the dark at a cool temperature — light turns them green and green potatoes contain solanine, which is bitter and mildly toxic, so cut away any green parts generously. A well-cured russet keeps for months. Any tuber that is cut or bruised should be eaten first, and small tubers can be saved as next year's seed potatoes if they are healthy and disease-free.
Common problems and fixes
| Problem | Likely cause | Fix |
|---|---|---|
| Tubers turn green | exposed to light | Earth up well and store tubers in the dark; cut green parts away before eating. |
| Rough, scabby patches on skins | potato scab in alkaline or dry soil | Keep soil slightly acid, water while tubers form, and avoid fresh manure. |
| Tops collapse with dark spots | blight | Remove affected foliage at once, water at the base, and rotate crops yearly. |
Tubers turn green
Likely cause: exposed to light. Green potatoes have been exposed to light, which triggers solanine — the green is a warning, not just a colour. Earth up thoroughly so no tuber sits near the surface, and store in complete darkness.
Rough, scabby patches on skins
Likely cause: potato scab in alkaline or dry soil. Scab is worst in alkaline, dry soil and where fresh manure has been used. The slightly acid pH russets prefer helps, as does steady watering while tubers are forming.
Tops collapse with dark spots
Likely cause: blight. Blight is the potato disease that matters: dark spots on leaves that spread fast in wet weather, then blackened stems. Cut off affected foliage immediately, do not compost it, and harvest the tubers promptly — blight can wash down into the soil and rot them.
Frequently asked questions
How long do russet potatoes take to grow?
Russet potatoes take 90–120 days from planting to harvest. They are a maincrop, long-season potato.
Do I need to chit russet potatoes?
Chitting — sprouting seed potatoes in a light, cool place before planting — gives earlier, more even growth, and it is worth doing. It is not essential: unchitted tubers will still grow, but they emerge later and less evenly.
Why do potatoes need earthing up?
Earthing up — drawing soil up around the stems as they grow — stops tubers turning green in the light, protects shoots from late frost, and gives the tubers room to form. It is the most important potato job: earth up every couple of weeks until the ridge is high.
Can I grow russet potatoes in containers?
Yes — russets grow well in large containers, sacks or towers, which makes harvesting easy: just tip the container out. Use a container of at least 40 litres, rich compost, and earth up with compost as the plant grows.