Irish Potato Farming in Kenya 2026 – The Complete Guide to Growing Irish Potatoes for Profit

Irish potatoes are the second most important food crop in Kenya after maize, and more than 800,000 smallholder farmers grow them in the highland areas of the country. The demand for potatoes that are used for making chips and crisps has grown a lot in 2026, and farmers who grow these special varieties can get 3,000 shillings for a 50 kilogram bag. Food companies like Kevian, Sereni, and Tropical Heat are always looking for farmers who can supply them with good quality potatoes on a regular basis.

Irish potato farming in Kenya has changed from a small scale activity to a serious commercial business, and farmers who buy certified seeds and use irrigation are getting 80 to 120 bags of 50 kilograms from one acre. This is much better than the 30 to 40 bags that farmers get when they use seeds saved from their own harvest. The potatoes are ready to harvest in 3 to 4 months depending on the variety, and a farmer who has water can plant two or three times every year.

The information in this article comes from farmers who are already making good money from potatoes and from research places like KALRO, ADC Molo, and Kisima Farm. You will learn about the different types of potatoes you can plant, how to get your land ready, how far apart to put the plants, what fertilizer to use, how to stop pests and diseases, when to harvest, and how much money you can expect to make from Irish potato farming in Kenya.

Why Irish Potato Farming in Kenya Is Growing Fast

Irish potato farming in Kenya is most common in the high altitude areas between 1,500 and 2,800 meters, and the main potato growing counties are Nyandarua, Nakuru, Elgeyo Marakwet, and Meru. These places have cool weather between 15 and 20 degrees Celsius, which is what potatoes need to form good tubers, and the soil is fertile and drains well. Farmers in these areas have been growing potatoes for many years, but now they are doing it as a business instead of just for feeding their families.

The market for Irish potatoes has changed in 2026 because different varieties are now used for different things. Shangi is the most popular variety for local markets and home cooking because it grows fast and tastes good. Tigoni is the variety that food companies prefer for making crisps because it has high dry matter and processes well. Markies and Marquis are grown for the fast food industry because they make excellent French fries. Jelly is a new variety that has yellow flesh and can be stored for a long time without going bad.

The biggest problem for potato farmers has always been prices going up and down, but the demand for processing varieties has made the market more stable. Food companies now sign contracts with farmers where they promise to buy all the potatoes at 3,000 shillings per bag if the quality is good. This helps farmers plan their farming because they know what price they will get, and they are not worried about prices crashing when many farmers harvest at the same time.

Choosing Irish Potato Seeds for Farming in Kenya

The seeds you plant determine the kind of potatoes you will get and how many you will harvest, so this choice is very important for farmers who want to make money. Certified potato seeds from KALRO, ADC Molo, and Kisima Farm cost between 3,500 and 4,800 shillings for a 50 kilogram bag, and one acre needs 8 to 10 bags depending on how big the seed tubers are. The total cost for seeds can be 28,000 to 48,000 shillings per acre, which is a lot of money, but farmers who use certified seeds get much higher yields than those who use saved seeds.

Shangi is the most popular variety in Kenya because it grows fast and matures in only 60 to 70 days, which means a farmer can plant two or three crops every year if they have irrigation. The potatoes are good for making chips and for boiling, but Shangi does not resist late blight well, so farmers need to spray fungicides often to protect their crop.

Tigoni is another popular variety that matures in 80 to 90 days, and it has medium resistance to late blight. The potatoes are large and look the same, and they are good for making crisps and for home cooking. Tigoni yields 80 to 100 bags per acre, which is higher than Shangi, and the potatoes can be stored for a longer time after harvest.

Markies and Marquis are special varieties that are grown for the fast food industry because they have high dry matter and make excellent French fries. These varieties mature in 100 to 110 days, which is longer than Shangi and Tigoni, but they have high resistance to late blight and fetch premium prices from processors.

Jelly is a new variety that is becoming popular because it yields 90 to 120 bags per acre, which is the highest of all varieties. The potatoes have yellow flesh and can be stored for a long time without going bad, which is a big advantage for farmers who want to sell when prices are high.

Land Preparation for Irish Potato Farming in Kenya

Potatoes need loose soil that has air in it so the tubers can grow big and round, and this requires digging the land deep to 25 or 30 centimeters. The soil should be free of stones because stones cause the potatoes to grow in strange shapes, and big lumps of soil should be broken so the tubers can expand easily. After digging, the land should be harrowed to break up the lumps and make a smooth seedbed.

The rows should be spaced 75 centimeters apart, and the plants should be spaced 30 centimeters apart within the row. This spacing gives about 18,000 plants per acre, and this is the best number for getting high yields. The furrows should be 15 to 20 centimeters deep, and the seed tubers should be placed with the sprouts pointing up.

Making ridges is very important in potato farming because it protects the growing tubers from sunlight. When potatoes are exposed to light, they turn green and produce a poison called solanine that makes them unsafe to eat. The ridges should be 25 centimeters high, and they should be made when the plants are 20 centimeters tall and again when they are 40 centimeters tall.

The best time to plant potatoes is at the start of the rains in March and April or October and November. Farmers who have irrigation can plant at any time of the year, but they should not plant during the cold months of June and July because the potatoes will grow slowly.

Fertilizer Management for Irish Potato Farming in Kenya

Potatoes need the right food at the right time to produce many good quality tubers. When planting, DAP fertilizer should be applied at 100 kilograms per acre, and it should be placed in the furrow but not touching the seed potatoes because it can burn them. DAP gives phosphorus, which helps the roots grow strong and the plants get established quickly.

Three to four weeks after planting, CAN fertilizer should be applied at 100 kilograms per acre by spreading it along the rows. CAN gives nitrogen, which helps the plants grow many leaves, and more leaves mean more energy for making tubers. The plants should be watered after applying fertilizer so the nutrients go down to the roots.

Potassium is also important for potato farming because it helps the plants resist diseases and makes the tubers firmer and better quality. Potassium should be applied at 50 kilograms per acre when the plants start to flower, and again after three weeks if the crop is still growing well.

Testing the soil before planting is very important because it tells you what nutrients your soil already has and what it needs. Too much nitrogen makes the plants grow too many leaves and few tubers, while too little nitrogen gives low yields and small potatoes.

Irrigation for Irish Potato Farming in Kenya

Potatoes need water all through the growing season, but they cannot grow in waterlogged soil because the tubers will rot. Drip irrigation is the best method because it puts water right where the roots are and keeps the leaves dry, which reduces the chance of late blight disease.

For the first three weeks after planting, the soil should be kept damp but not soaked so the seed potatoes can sprout and the roots can grow. During the time when the plants are growing leaves, water them regularly to help the leaves develop. The most important time for water is when the tubers are forming, which happens six to eight weeks after planting, and the plants need steady moisture to set many tubers.

Sprinklers and rain hose kits are becoming more popular because they can water a large area quickly. Watering early in the morning is best because the leaves have time to dry during the day, which reduces the risk of late blight.

Late Blight Management in Irish Potato Farming

Late blight is the most dangerous disease in potato farming because it can kill the whole crop in just a few days. The disease is caused by a germ that spreads very fast in wet, humid weather, and it makes dark spots on the leaves that quickly turn black and rot. The tubers can also get infected, causing them to rot in storage.

The only way to control late blight is to prevent it from starting, and this requires spraying fungicides on a regular schedule. Start spraying when the plants are 15 centimeters tall, and continue every 7 to 10 days until the crop is ready to harvest. Use both contact fungicides and systemic fungicides, and change between different types so the disease does not become resistant.

The best time to spray is in the morning when there is no wind, and the spray should cover both the top and bottom of the leaves. Any plants that have the disease should be removed from the field as soon as they are seen, and they should not be put in the compost pile because the germs can survive and infect the next crop.

Other Pests and Diseases in Irish Potato Farming

Bacterial wilt is another serious disease that affects potatoes in Kenya, and it makes the plants wilt and die suddenly. There is no cure for bacterial wilt, and the bacteria can stay in the soil for many years. The only way to control it is to prevent it by using certified disease-free seed potatoes, rotating crops, and not planting in fields where tomatoes, peppers, or eggplants have grown recently.

Aphids are small insects that suck sap from the plants and spread viruses, and they can cause the plants to be stunted and produce few potatoes. Aphids can be controlled with neem oil or insecticidal soap, and yellow sticky traps can be used to see how many aphids are in the field.

Potato tuber moths are another pest that attacks the potatoes both in the field and in storage. The caterpillars dig tunnels into the potatoes, causing them to rot and become unfit to eat. Tuber moths can be controlled by making ridges around the plants to cover the potatoes, and by storing harvested potatoes in cool, dark places.

Harvesting Your Irish Potatoes

Potatoes are ready to harvest when the leaves start to turn yellow and die, which is usually 3 to 4 months after planting depending on the variety. Stop watering two weeks before harvest so the skins can harden, which makes the potatoes less likely to get damaged when they are dug up.

Harvest on a dry day when the soil is not too wet, and use a fork or a potato harvester to lift the tubers from the ground. Be careful not to damage the potatoes because damaged ones will rot in storage. Sort the potatoes by size and quality, and remove any that are damaged, diseased, or green.

Store the potatoes in a cool, dark, well-ventilated place. The best temperature for storage is 4 to 10 degrees Celsius, and the humidity should be high so the potatoes do not dry out. Sunlight makes potatoes turn green and produce solanine, which is poisonous, so the storage area must be dark.

How Much Money You Can Make from Irish Potato Farming

The first season of growing Irish potatoes on one acre costs about 106,500 shillings for certified seeds, land preparation, fertilizer, fungicides, insecticides, and labor. The potatoes will be ready to harvest 3 to 4 months after planting, and the total harvest can be 60 to 120 bags of 50 kilograms each.

At an average price of 3,000 shillings per bag, the revenue from 80 bags is 240,000 shillings. After subtracting the costs of 106,500 shillings, the profit is about 133,500 shillings for one season. With two seasons per year, the annual profit can reach 267,000 shillings per acre.

Farmers who grow processing varieties like Markies or Tigoni can get 3,500 to 4,000 shillings per bag through contract farming with food companies. A farmer who harvests 100 bags at 3,500 shillings per bag gets 350,000 shillings, and after costs, the profit is 243,500 shillings per season. With two seasons, the annual profit is 487,000 shillings per acre.

Next Step for Irish Potato Farming in Kenya

Irish potato farming in Kenya is a good business for farmers who have good land and are willing to buy certified seeds and control diseases properly. Certified seeds cost 3,500 to 4,800 shillings per 50 kilogram bag, and one acre needs 8 to 10 bags. A well-managed acre produces 80 to 120 bags of 50 kilograms each, and the price per bag ranges from 2,500 to 4,000 shillings depending on the variety and the season. With two seasons per year, a farmer can earn over 250,000 to 500,000 shillings per acre annually.

The best time to plant is at the start of the rains in March and October, and farmers should prepare their land, test their soil, and order certified seeds before planting. Shangi is good for fast maturity, Tigoni is good for crisps, and Markies and Marquis are good for French fries.

For certified potato seeds, soil testing, and the 2026 Irish potato farming in Kenya PDF guide, call Farmers Trend Ltd at 0790509684. The farmers who switched to certified seeds and proper disease control are now getting 80 to 120 bags per acre, which is much more than they used to get, and they are earning good money every season. The time to start your Irish potato farming in Kenya journey is now.

https://farmerstrend.co.ke/crops/potato-farming/irish-potato-farming-in-kenya-guide/https://farmerstrend.co.ke/wp-content/uploads/2026/04/potato-harvest-768x1024.jpeghttps://farmerstrend.co.ke/wp-content/uploads/2026/04/potato-harvest-150x150.jpeg2026-04-29T16:43:51+00:00FarmersTrendPotato Farming# TrendingBest potato varieties for chips in Kenya 2026,Certified potato seeds price in Kenya,Farmers Trend potato seeds,Irish potato farming in Kenya PDF,Jelly potato variety Kenya,KALRO certified potato seeds,Late blight control potatoes,Markies potato for French fries,Potato spacing 75cm x 30cm,Potato tuber moth control,Shangi potato variety characteristics,Tigoni potato yield per acreIrish potatoes are the second most important food crop in Kenya after maize, and more than 800,000 smallholder farmers grow them in the highland areas of the country. The demand for potatoes that are used for making chips and crisps has grown a lot in 2026, and farmers who...FarmersTrendjohn doefarmerstrend@gmail.comAdministratorFarmers Trend Ltd.