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How Long Do Potatos Take To Grow

How Long Do Potatoes Take To Grow

Today is the age of food security and potato acts as a staple food in many countries. For potato lovers, it is a more tedious job to wait for potato. To ensure the right commodity of potato at the right time, you should know about the factors which play their role in different developmental stages of potato.

Here in this article, I will tell you about how long potato takes to grow. Side by side the different growth stages of potato along with the factor that plays a role in the growth and by which means the growth of potato delay.

First of all, I will tell you about the different growth stages of potatoes and the time taken by each phase to complete.

Different growth stages of potato:

There are five primary developmental stages of potato which the plant cover during its short growing cycle which lasts for 3-4 months. Most of the changes are not visible because potato tubers develop underground.


First of all, the eyes from the potato emerge out from the ground and develop into a sprout. These sprouts become visible and develop into vegetative part of the plant known as stems and leaves. During the sprouting stage, the starch content of the tuber becomes the only source of nutrition of the plant. At this stage the soil temperature will affect the sprouting it will decide how long this stage will take and sprouting will not happen if the soil temperature is close to freezing.

Vegetative stage:

After sprouting the visible above-ground portion of the plant to start developing, it is the second stage of growth. At this stage essential part of plant-like leaves, stem and root system of the plant start developing and ultimately photosynthesis begins which provide nourishment for the developing plant. For this stage, warmer temperatures of 77oF or more for about 14 to 18 hours of sunlight are preferred. The sprouting and vegetative states combined can last from 30 to 70 days.

Tuber initiation:

The tubers begin forming at the tip of the stolon of the potato plant, but they are not yet enlarging at this stage. Stolon is basically underground stems and most of the potato mass lies 18-24 inches below the soil surface. The shallow part of the tuber means that they required sufficient water which is important for healthy potato growth. Along with irrigation, the photosynthesis process plays a vital role in the nourishment of the plant and nutrients are stored in the early tubers which required in the next stage, where they begin to bulk up. The tuber initiation period will last for about two weeks. For most of the potato varieties, a stage reach where plant move to reproductive stage.

Tuber bulking:

The tuber cells start expanding and grow significantly in the next developmental stage. Here is the buildup of carbohydrates, water, and other nutrients in the tubers. This growth stage lasts for the longest period and takes about three months to complete which depends upon the growing conditions and type of potato plant. During this period, the plant prefers cooler temperatures having shorter days.


Photosynthesis slows down with the passage of time, which leads to the yellowing of vines and falling of leaves. As the potato tuber continues the deposition of starch in them then the vegetative part of the plant which is above ground will slowly die. However, if such varieties are used which had a longer life cycle than the growing season, then the maturation stage may not fully finish before harvest needs to take place. As potato plant leads through this stage, the skin of the potato toughens and made it more friendly for storage.

Factor plays a role in the growth of potato:

Both biotic and abiotic factor plays a vital role in the growth of the potato. Each plant species has its own physiological mechanism which works better when the optimum condition is given because at the optimum condition the enzyme works at a good pace which ultimately helps in the different physiological mechanisms. When the physiological process of the plant moves at an optimum rate than the rate of growth also becomes high. The physiological mechanism of the plant depends both on genetic and environmental factors. Here I will tell you both genetic and environmental factor which play a role in the growth of the plant.

Genetic Factor:

Genetic factor plays a vital role to complete the growth phases in a short time. The growth factor depends on the variety to choose from. On the basis of growth completion, there are three types of varieties available.

Early varieties: By growing these varieties, you can get potato harvest in 90 days. Many famous varieties are Irish cobbler and King harry.

Mid-season varieties: They take a bit longer than early varieties to mature enough for harvesting. It may take more than a hundred days to give a proper harvest. The most famous varieties of this type are Yukon Gold and Red Lasorda.

Late varieties: They take more than 110 days to give high yield harvest. By extending the duration they give a high yield. The most common varieties are Butte and Kennebec.

Extra late varieties: Elongated fingerling potatoes are very common and fast-growing potatoes. If you want to grow fast, then it is not an ideal choice. You can speed up the growth process by pre-sprouting process.

To grow early harvest potato always chose early varieties that provide harvest in just 3 months. Otherwise, if you prefer other varieties for their taste then improve culture practices like done pre-sprouting to speed up the process.

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Potatoes growth time

Environmental Factor:

Along with the role of genes, an environmental factor also plays in completing the different growth phases of the plant. Only genes can do nothing if suitable environmental conditions are not provided. So to get optimum growth you have to provide the best environment for the growth of the potato. In the environmental factor, both natural and cultural practices include because both of them affect the growth of the plant. Here is a certain environmental factor that plays a role in the growth of the potato.

Growing Degree days:

It is also known as a Growing degree unit. It is a weather-based indicator for assessing crop development. Growing degrees (GDs) is defined as the mean daily temperature (average of daily maximum and minimum temperatures) above a certain threshold base temperature accumulated on a daily basis over a period of time. Each plant phase required its own degree days to complete its growth phase. The main key role played by degree days is temperature. You can calculate degree days for each phase by this formula.

mimum temperature)/2 –base temperature of plant

Here the base temperature is that temperature below which the plant ceases its growth. In this way, the optimum temperature is required to improve the growth of the plant. If the temperature is below its optimum temperature, then it will prolong the period of that phase. The days given for each phase is already mentioned above are those days when plant grow under optimum temperature. On the other side when the temperature rises above the optimum temperature it will first accelerate the growth rate and plant complete its growth phase less than the required degree days but it will affect the quality of the potato because as temperature rise it will act as a stress for the plant and plant move to the reproductive phase for its survival which ultimately affects the quality of the plant, so optimum temperature is required for the proper growth.

Soil requirement:

As we know potato tuber grows beneath the soil so if the soil condition is favorable and temperature of the soil is up to a level then it will ultimately enhance the growth rate and you will get potato at the right time. If any of the factors are missing, then leads to stress which ultimately affects the growth rate and quality of potato and growth of potato ultimately got affected.

Seed potatoes require a well-drained soil that has an optimum temperature of a minimum of 40o Fahrenheit. Otherwise, the cold soggy soil is not suitable for the seed potato because it will rot the pieces of potato tubers. If your garden has poorly drained soil like heavy clay, consider sowing the seed potatoes in raised beds to boost drainage and avoid rotting. You will improve soil conditions by adding organic matter to the soil before planting, like compost, rotted leaves or at least two-year-old farmyard manure, to assist the growth of tubers.

Cultural practices:

To improve the growth of potato tubers, you have to improve the cultural practices of the plant. Here are the following cultural practices you have to opt to increase the growth rate of potatoes.

Proper spacing: You have to maintain the proper distance among the plant for better growth of the potato. If the proper distance is not maintained, then there will be a race among the plants for sunlight which ultimately increases the vegetative growth and at the main time, the formation of the tuber is a delay so by maintaining the proper distance you cut off the competition and ultimately potato develop faster.

Reducing the tuber formation: Always ensure that a plant can form 2-3 potato tuber otherwise a single plant fail to fulfill the starch content of multiple tubers and you did not get the desired potato at right time.

Proper tillage practices: Use appropriate tillage to make the soil porous which ultimately enhances the growth rate of potato. On the other hand, compaction of soil does not allow to tuber to grow properly, which affects the period of potato development.

Protection from pest: you have to protect the potato plant from all types of pests because they act as biotic stress which ultimately affects the growth rate of the plant.

Irrigation and Fertilization: Application of fertilizer and irrigation at the right time with optimum range will enhance the formation of potato tubers.

Certified seed potato:

For better growth of potato always buy certified seed potatoes from the garden center but never use store-bought potatoes as seed potatoes because most of the store potatoes are treated with a chemical that stops sprouting. Moreover, store seed potatoes are more prone to diseases than certified seed potatoes. If you save your own potatoes for seed then take great care of them, if you find any symptoms of disease then discard them as you see the sign of disease then it may lead to a range of discoloration of soft tissue and also may lead to wrinkled tubers.

Handling seed potato:

How well you handle the seed potatoes will play a vital role in how well they grow. If the seed potatoes are larger than an egg size then you should prefer 1- ½ inch chunks with a minimum of two eyes, while egg-sized or smaller tubers are planted as a whole. Cut seed potatoes bruise more easily than the whole potatoes which might damage cells and make them more prone to disease. Disease within the soil or that already exists on the tubers can easily enter these bruised areas and protect them from distortion.

Curing potato:

Curing of potato acts as a protection by allowing them to make a protective covering on exposed cut surfaces. To cure cut seed potatoes by allowing them to sit in a seat during a room with a temperature of about 40oF for 6-10 days. Ensure the seed potatoes receive good air circulation and a ratio of 85-95% to enhance healing and avoid dehydration. After curing shift the seed potatoes to a hotter room at about 70oF and allow them to sprout before planting.

Reason for delayed potato:

Slow-to-emerge potato plants are often the results of sowing them in soil that is too wet, cold or dry. Freshly cut seed potatoes can become dehydrated, fail to heal properly or develop the disease, preventing growth. Freshly cut potatoes need oxygen, high humidity and soil temperatures between 50 and 65 F to heal it properly. If the soil does not offer these conditions, cure the seed potato before planting. It will enhance the formation of potato. If the soil does meet these conditions, plant seed potato immediately after cutting to get an early harvest.

Hopefully, now, you get that how to improve the growth rate of potato and get early harvest with good yield and quality.

What started as a personal experience to improve my overall health by growing my own food has turned into a mission to share my experience and my own research. Growing your own food and eating healthier food is something that everyone has to try.

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