How to Plant Potatoes: The Complete Step-by-Step Guide (17 Expert Tips for a Bigger Harvest in 2026)
How to Plant Potatoes: The Complete Step-by-Step Guide (17 Expert Tips for a Bigger Harvest in 2026)
Meta Title (60 characters)
How to Plant Potatoes: Complete Guide for Bigger Harvests
Potatoes are among the easiest and most rewarding crops you can grow. Whether you have a backyard garden, raised bed, farm, or just a few grow bags on your balcony, potatoes can produce an impressive harvest with the right planting techniques.
Yet many beginners make simple mistakes that drastically reduce yields. They plant supermarket potatoes instead of certified seed potatoes, bury tubers too deep, overwater them, or forget to hill the plants as they grow. These mistakes often lead to smaller harvests, disease problems, or green, inedible potatoes.
The good news is that growing potatoes doesn't have to be difficult.
In this comprehensive guide, you'll learn everything you need to know—from choosing the right seed potatoes and preparing your soil to planting, watering, fertilising, harvesting, and storing your crop for months. The recommendations in this guide build on established growing practices described across leading potato-growing resources while presenting them in a single, practical workflow.
By the end, you'll have the knowledge needed to grow healthy potato plants and enjoy a bigger, better harvest.
Table of Contents
Why Grow Potatoes?
Understanding Potato Varieties
Best Time to Plant Potatoes
Choosing the Right Seed Potatoes
Preparing Your Soil
Preparing Seed Potatoes
How to Plant Potatoes Step by Step
Growing Potatoes in Containers
Watering Potatoes
Fertilising for Maximum Yield
Hilling Potatoes
Common Mistakes to Avoid
Pests and Diseases
Harvesting
Storing Potatoes
Frequently Asked Questions
Why Grow Potatoes?
Few crops offer as much value as potatoes.
A single seed potato can produce multiple new potatoes under the right conditions. They are nutritious, versatile in the kitchen, and suitable for gardens of almost any size. Because they grow underground, they are also less vulnerable to some environmental challenges than many leafy vegetables.
Potatoes have been cultivated for thousands of years, originating in the Andes of South America before spreading across Europe and eventually the rest of the world. Today, thousands of potato varieties exist, each with different colours, textures, flavours, and growing habits.
Understanding Potato Varieties
Choosing the right variety is the first step towards a successful harvest.
Potatoes generally fall into three maturity groups.
Early Potatoes
These mature first and are ideal if you want fresh potatoes quickly.
Typical growing period:
60–80 days
Examples include:
Irish Cobbler
Red Norland
Purple Majesty
These varieties are perfect if your growing season is short.
Mid-Season Potatoes
These offer a balance between yield and growing time.
Typical maturity:
80–100 days
Examples include:
Yukon Gold
Red Pontiac
Viking
Late-Season Potatoes
These produce the largest harvests and store exceptionally well.
Typical maturity:
100–130 days
Examples include:
Kennebec
Elba
German Butterball
Late varieties are an excellent choice if you're growing potatoes for long-term storage.
Best Time to Plant Potatoes
Timing is one of the biggest factors affecting yield.
Planting too early can cause seed potatoes to rot in cold, wet soil, while planting too late shortens the growing season.
Most growers recommend planting:
About 2–4 weeks before the last expected frost in cooler climates.
Once the soil reaches at least 45°F (7°C) before planting.
If you're in a warmer region, planting seasons may differ, with some areas planting during cooler months instead of spring.
Choose Certified Seed Potatoes—Not Grocery Store Potatoes
One of the biggest mistakes beginners make is planting potatoes bought from supermarkets.
While they may sprout, supermarket potatoes are not intended for planting. They may carry diseases or have been treated in ways that affect growth.
Instead, use certified seed potatoes, which are selected specifically for planting and help reduce the risk of disease.
How Many Potatoes Does One Seed Potato Produce?
This is one of the most common questions beginners ask.
Although the exact number varies with the variety and growing conditions, a healthy seed potato can produce multiple new tubers. Proper soil preparation, correct spacing, regular watering, and hilling all contribute to achieving higher yields. The source material emphasises that healthy plants, proper moisture, and good maintenance practices are essential for maximising production.
Preparing the Soil
Healthy potatoes start with healthy soil.
Potatoes grow best in:
Loose soil
Well-drained soil
Nutrient-rich soil
Slightly acidic soil
Avoid compacted soil because it restricts tuber development.
Many experienced growers add compost before planting to improve soil structure and fertility. Well-rotted compost is preferred over fresh manure. Fresh manure may increase the risk of common scab and encourage excessive leafy growth when nitrogen levels are too high.
Preparing Seed Potatoes
Large seed potatoes shouldn't always be planted whole.
If they're larger than a golf ball, many growers cut them into pieces before planting.
Each piece should have:
At least one or two healthy eyes
Enough potato flesh to support early growth
After cutting, leave the pieces to dry and form a protective callus before planting. This reduces the risk of rotting once they are placed in the soil.
How to Plant Potatoes (Step by Step)
Step 1: Dig a Trench
Dig a trench approximately 6–8 inches deep.
This creates enough space for the developing tubers while allowing soil to be added gradually as the plants grow.
 |
| Potato Trench |
Step 2: Space the Potatoes Properly
Place seed potatoes 10–15 inches apart, depending on variety and available space, with rows roughly 3 feet apart. Wider spacing generally provides more room for larger plants and makes hilling easier.
Step 3: Position the Eyes Upward
Lay each seed piece with the cut side down (if cut) and the eyes pointing upward to encourage healthy shoots.
Step 4: Cover Lightly
Instead of filling the trench completely, begin by covering the seed potatoes with only part of the excavated soil. As the plants grow, gradually add more soil around the stems through the hilling process.
Growing Potatoes in Containers
Don't have a garden? No problem.
Potatoes grow exceptionally well in containers, making them ideal for balconies, patios, rooftops, and small urban spaces.
In fact, many home gardeners prefer growing potatoes in containers because it reduces soil-borne diseases, simplifies harvesting, and gives you greater control over watering and soil quality.
Best Containers for Potatoes
Almost any large container with drainage holes will work, including:
Fabric grow bags
Plastic grow bags
Large buckets
Wooden boxes
Half barrels
Large flower pots
The container should hold at least 5 gallons (19 litres) of soil, although larger containers generally produce better yields. Drainage holes are essential to prevent waterlogging, which can cause seed potatoes to rot.
Best Soil Mix for Containers
A quality potting mix works much better than ordinary garden soil.
A good mix contains:
60% quality potting mix
30% compost
10% perlite or coarse sand
This combination provides excellent drainage while retaining enough moisture for healthy tuber development.
How to Plant Potatoes in Containers
Add about 6 inches (15 cm) of soil to the container.
Place one or two seed potatoes on top.
Cover with another 2 inches (5 cm) of soil.
Water thoroughly.
As the shoots grow, continue adding soil until the container is almost full. This process mirrors hilling and encourages more underground stems to produce tubers.
Watering Potatoes Properly
Water management can make the difference between a bumper harvest and disappointing, cracked, or undersized potatoes.
Many beginners either overwater or underwater their crop.
Both are costly mistakes.
How Much Water Do Potatoes Need?
As a general guide, potatoes require about 1–2 inches (25–50 mm) of water per week, depending on rainfall, soil type, and weather. Sandy soils often need more frequent watering because they drain faster.
When Is Water Most Important?
The most critical period is during flowering and immediately afterwards.
At this stage, the plant is actively forming and enlarging its tubers. Inconsistent watering during this period can reduce both yield and quality.
Signs Your Potatoes Need Water
Look out for:
Wilting leaves
Dry soil several centimetres below the surface
Slow plant growth
Avoid watering every day. Instead, water deeply so moisture reaches the root zone.
Stop Watering Before Harvest
When the foliage begins to yellow and die back naturally, stop watering. This allows the skins to harden, improving storage quality and reducing the risk of rot.
Fertilising Potatoes for Bigger Harvests
Many gardeners assume that adding lots of nitrogen will increase potato yields.
The opposite often happens.
Too much nitrogen encourages lush leafy growth at the expense of tuber development.
Research-based recommendations favour fertilisers with more phosphorus (P) and potassium (K) than nitrogen (N). A ratio such as 5-10-10 is commonly suggested because phosphorus and potassium support strong root and tuber development.
Best Organic Fertilisers
Good organic options include:
Well-rotted compost
Bone meal
Wood ash (used carefully)
Well-composted poultry manure
Seaweed-based fertilisers
Avoid applying fresh manure directly before planting, as it may increase the risk of common scab.
Fertiliser Schedule
Before Planting
Mix compost into the soil.
When Plants Reach 15–20 cm
Apply a balanced fertiliser.
Just Before Flowering
Apply a potassium-rich fertiliser to support tuber bulking.
Avoid heavy nitrogen applications once the plants are well established.
Why Hilling Is So Important
If there's one practice many beginners skip, it's hilling.
Unfortunately, it's also one of the biggest reasons for poor harvests.
What Is Hilling?
Hilling means pulling loose soil—or another suitable covering material—around the base of the potato plant as it grows.
This keeps developing tubers covered and encourages the plant to produce more underground stems, where potatoes form.
Benefits of Hilling
Hilling helps to:
Protect potatoes from sunlight, preventing them from turning green.
Encourage additional tuber formation.
Improve drainage around the plants.
Support taller stems against wind.
When Should You Hill?
Carry out the first hilling when the shoots are around 8 inches (20 cm) tall.
Repeat the process after another 8 inches (20 cm) of growth. Many growers stop hilling once the vines begin flowering.
Can You Use Straw Instead of Soil?
Yes.
Loose straw can be used after the initial hilling to help retain moisture, suppress weeds, and continue protecting developing tubers, provided it allows the soil to breathe.
10 Common Potato Planting Mistakes to Avoid
Even experienced gardeners occasionally make these errors.
1. Planting Supermarket Potatoes
They may carry diseases and are not intended for planting. Choose certified seed potatoes whenever possible.
2. Planting in Waterlogged Soil
Poor drainage can cause seed potatoes to rot before they sprout.
3. Using Heavy Clay Soil Without Improvement
Dense soils can produce misshapen tubers. Improve them with compost or use raised beds.
4. Skipping Hilling
Exposed potatoes can turn green and become unsuitable for eating.
5. Overwatering
Constantly wet soil encourages disease and poor-quality tubers.
6. Forgetting Crop Rotation
Avoid growing potatoes in the same location every year. Rotating crops helps reduce disease build-up in the soil.
7. Planting Too Close Together
Crowded plants compete for nutrients, sunlight, and space, reducing yields.
8. Applying Too Much Nitrogen
Excess nitrogen promotes foliage instead of tubers.
9. Harvesting Too Early
Allow storage potatoes to mature fully so they develop thicker skins for better keeping quality.
10. Washing Potatoes Before Storage
Store potatoes dry and unwashed to reduce the risk of rot.
Common Potato Pests and Diseases (And How to Prevent Them)
Even if you plant your potatoes correctly, pests and diseases can reduce your harvest if they aren't managed early. The best approach is prevention rather than treatment.
Healthy plants grown in suitable conditions are naturally more resistant to many common problems.
1. Late Blight
Late blight is one of the most destructive potato diseases. It spreads rapidly during cool, wet weather and can destroy an entire crop within days.
Symptoms
Dark brown or black patches on leaves
Brown lesions on stems
White fungal growth underneath leaves in humid conditions
Rotting tubers
Prevention
Buy certified disease-free seed potatoes.
Avoid overhead watering, especially in the evening.
Improve air circulation by spacing plants correctly.
Rotate crops every 3–4 years.
Late blight is identified by dark, water-soaked patches on stems and leaves, and crop rotation is recommended to reduce disease pressure.
2. Early Blight
Unlike late blight, early blight usually appears during warmer weather.
Symptoms
Small brown spots
Circular "target-like" rings
Yellowing leaves
Removing infected leaves early can help slow its spread.
3. Common Scab
This disease affects the potato skin rather than the flesh.
Although scabby potatoes are still edible, they don't look attractive and have a shorter storage life.
Prevention
Avoid fresh manure.
Maintain slightly acidic soil.
Use certified seed potatoes.
Fresh manure and alkaline soils can increase the risk of common scab.
4. Colorado Potato Beetle
One of the most damaging insect pests.
Both adults and larvae feed aggressively on potato leaves.
Signs
Chewed leaves
Orange eggs under leaves
Black-striped beetles
Hand-picking beetles in small gardens can be surprisingly effective.
5. Potato Leafhoppers
These insects suck plant sap, causing:
Curled leaves
Brown leaf edges
Stunted growth
Good weed control helps reduce their populations because weeds often harbour insect pests.
When to Harvest Potatoes
Harvesting at the right time is just as important as planting correctly.
Dig them too early and they'll be small.
Wait too long in poor conditions and they may begin to rot.
The ideal harvest time depends on whether you want new potatoes or storage potatoes.
Harvesting New Potatoes
New potatoes are small, tender potatoes with delicate skins.
Harvest them approximately 2–3 weeks after flowering.
To avoid damaging the plant:
Carefully loosen the soil beside the plant.
Remove only the largest tubers.
Leave the smaller ones to continue growing.
These potatoes have thin skins and are best eaten fresh rather than stored.
Harvesting Mature Potatoes
If you want potatoes for long-term storage, patience pays off.
Wait until:
The foliage turns yellow.
The vines die back.
The skins become firm.
Many growers wait 2–3 weeks after the foliage has completely died before harvesting storage potatoes. This helps the skins toughen and improves keeping quality.
How to Harvest Without Damaging Tubers
Use a garden fork rather than a shovel where possible.
Insert the fork well away from the stem.
Lift gently.
Never stab directly into the centre of the plant.
Damaged potatoes spoil much faster in storage.
How to Cure Potatoes Before Storage
One of the biggest mistakes beginners make is storing freshly harvested potatoes immediately.
Freshly dug potatoes have delicate skins.
They need time to cure.
How to Cure Potatoes
Spread them in:
A garage
A shed
A covered porch
Any dark, well-ventilated area
Avoid direct sunlight.
Allow good airflow while curing, then store them in a cool, dark, dry, well-ventilated place. Do not wash them until you're ready to cook them.
How to Store Potatoes for Months
Proper storage can keep potatoes in good condition for several months.
Ideal Storage Conditions
Cool
Dark
Dry
Well ventilated
Light causes potatoes to turn green.
Moisture encourages rot.
Warm temperatures encourage sprouting.
According to the source material, ideal storage temperatures are around 35–40°F (2–4°C), and potatoes should remain unwashed until use.
Expert Tips for a Bigger Harvest
These simple practices can noticeably improve your results.
✔ Choose certified seed potatoes
Healthier planting material produces healthier crops.
✔ Rotate your crops
Avoid planting potatoes in the same location every year. A break of several years helps reduce disease pressure.
✔ Hill consistently
Regular hilling keeps tubers covered and encourages more potatoes to develop.
✔ Keep weeds under control
Weeds compete for water and nutrients and can provide shelter for pests.
✔ Harvest on a dry day
Dry soil makes harvesting easier and helps reduce damage and excess moisture on freshly dug potatoes.
Frequently Asked Questions
Can I plant potatoes from the supermarket?
You can, but certified seed potatoes are recommended because they are less likely to carry diseases and are intended specifically for planting.
How deep should I plant potatoes?
Most sources recommend planting seed potatoes 2–4 inches (5–10 cm) deep initially, then gradually covering the stems through hilling as the plants grow.
How far apart should potatoes be planted?
Generally, 10–15 inches (25–38 cm) between plants and about 3 feet (90 cm) between rows provides enough room for healthy growth.
How long do potatoes take to grow?
Depending on the variety, potatoes usually mature in 60–130 days, with early, mid-season, and late-season cultivars differing in growing time.
Why are my potatoes green?
Green potatoes have been exposed to sunlight because they were not adequately covered with soil. Regular hilling helps prevent this problem.
Can potatoes grow in bags?
Yes. Grow bags and other large containers with drainage holes are a popular option, especially where garden space is limited.
Final Thoughts
Growing potatoes is one of the most satisfying gardening projects, whether you're tending a backyard plot, raised bed, or a few containers on a patio. Success comes from getting the fundamentals right: choose healthy seed potatoes, prepare loose, fertile soil, plant at the correct depth and spacing, hill the plants as they grow, water consistently during tuber formation, and harvest only when the crop has reached maturity.
Follow these principles and you'll be rewarded with healthier plants, higher yields, and delicious homegrown potatoes that often taste far better than shop-bought ones.
Comments