Peanut plants are grown as annual plants, so they only grow during one season. But how exactly does this work, and what’s the lifespan of a peanut plant?

The lifespan of a peanut plant is one year because it’s grown as an annual plant. It can only grow during the warm season and it needs at least 120 frost-free days in the year. Once the year has passed, the plant naturally dies. It can take approximately five months for a peanut to grow to maturity.

The rest of this article will discuss the lifespan of a peanut plant in greater detail. It’ll also discuss the life cycle of a peanut plant and how to grow peanuts effectively.

Can a Peanut Plant Live Longer Than a Year?

A peanut plant cannot live longer than a year. Once the year is done, its work will be done, and you must plant a new one the following spring. Peanut seeds are generally sown during spring and harvested at the beginning/end of fall.

Peanut plants are grown as annual plants, meaning they’re only active for one season, which makes it impossible for them to live longer than a year. In the United States, peanuts are generally planted in April, and they grow throughout the summer. 

After planting the seeds, it can take four to six months to harvest the peanuts. You must remove the whole plant from the soil to harvest the peanuts.

The Process Of Growing Peanut Plants

Now, let’s look at the steps of growing a peanut plant. It’s important to remember that the process should only be done during the warm season or your plant won’t grow. Growing peanuts is relatively simple once your soil is at the right temperature.

Check the Soil Temperature

Before planting peanuts, the soil needs to be at the correct temperature. For peanuts, the best soil temperature is approximately 70℉ (21.1℃). 

Generally, the soil reaches this temperature between April and May each year. 

If the soil is too cold or hot, your plant won’t grow, so you probably don’t want to try to plant your peanut seeds at a temperature below 60℉ (16℃).

Ensure Soil Is Well-Drained

Peanut plants require sandy and well-drained soil, so your soil must meet these requirements. Avoid hard, clay-like soil at all costs, and make sure the spot you choose to plant your peanuts receives the most sunlight. Peanut plants thrive in direct sunlight.

Plant the Seeds

Once your soil is at the correct temperature and in appropriate condition, you can plant the peanut seeds. It’s best to sow the seeds 1”-2” (2.54 to 5.08 cm) deep. Once you’ve planted them, you can leave them be for now.

Water Weekly

Peanuts need approximately 1” (2.54 cm) of water every week. Keep any rainfall in mind, as overwatering can slow the growth process. Alternatively, you can choose to water the soil anytime it looks and feels dry. In places with arid weather, the soil may need water more than once a week.

Let It Grow

As you continue watering your peanut plant every week, the only other thing to do is let it grow. You’ll notice plenty of growth by around the 10th day, and it’ll continue to grow for the next few months.

Once the plant has yellowed, the peanuts are ready for harvesting.

Harvesting Peanuts

Peanuts are generally harvested between September and October in the United States. The exact time to harvest the seeds will depend on when you planted them and the type of seed you used. 

After they’re harvested, the peanut plant is no longer useful. Its life will end, and you’ll need to plant a new plant the following spring.

Once the plant is fully grown, it should reach around 18” (45.72 cm) tall. During the summer, it’ll have a primarily green color. But as it matures and gets closer to harvesting time, the plant will begin to yellow. 

Here are some tips for harvesting peanuts:

  • Check a few peanuts before harvesting everything. Although peanut plants grow foliage above the soil, the peanuts grow beneath it, which makes it difficult to know if the peanuts are mature enough. Dig up some of them and open the pods to check this. If the kernel fills the entire pod, it’s ready for harvesting. If it doesn’t fill it, it needs more time to grow.
  • Use a shovel or pitchfork. To remove the plants, you’ll need a pitchfork or shovel. Be careful not to damage the peanuts as you dig down, and try not to remove any pods from the plant.
  • Leave the plants in the sun to dry. Once you’ve harvested the plants, you should leave them for a few weeks in the sun, as this allows the plant to dry out. Once it’s dry, you can remove the peanuts.

Why Do Peanut Plants Only Last a Year?

Peanut plants only last a year because spring and summer are the favorable growing seasons for peanuts. Once the peanuts are ready to harvest, you must dig up the plant and dry it out. At that point, the plant is no longer useful and can’t be reused.

However, there is another type of peanut plant called the perennial peanut plant, which lasts up to 30 years. But it doesn’t produce any seeds, meaning it doesn’t make peanuts. It only grows above the soil as a flower, so you can’t use it if you want to grow peanuts. 

It’s primarily grown as a groundcover.

Even though perennial peanut plants don’t produce peanuts, the leaves are edible and can be incorporated into many cooked meals.


The lifespan of a peanut plant is no more than one year, as peanuts can only be grown during the warm seasons. Once the peanuts are ready for harvest, the plants are removed from the soil and dried out, so you can’t replant them.

You must plant new peanut seeds each spring rather than using the same plant. 

However, there’s also a perennial peanut plant, which can last up to 30 years. Although it’s called a peanut plant, it doesn’t produce peanuts.

Similar Posts