How Do Peanuts Grow? Underground, Not on Trees

Most of us meet a peanut as a snack: a handful from a party bowl, a bag of toffee glazed kernels in a lunchbox, a bar mix on game night. Very few of us have seen one in the ground, and the way a peanut grows surprises almost everyone who learns it.

So, how do peanuts grow? Not on trees. The plant flowers above the soil, then sends a tiny stalk down into the dirt, and the pods form underground. This guide follows the whole cycle from seed to harvest, explains the odd step in the middle, and shows where in the United States it all happens.

Quick Summary

Peanuts grow on a low, leafy plant. Seeds go into warm soil in spring, yellow flowers open within about six weeks, and each pollinated flower sends a short stalk called a peg into the ground, where the pod swells out of sight. Farmers dig the plants up roughly four to five months after planting.

• They do not grow on trees. The plant stays low, around 18 inches tall, and the pods develop under the soil.
• Flowers open above ground. Small yellow blooms appear near the base of the plant and pollinate themselves.
• Pegging is the unusual step. After pollination a stalk bends down, pushes into the soil and forms the pod at its tip.
• The cycle takes four to five months. Most US fields are planted in April and May and dug in the fall.
• The Southeast grows most of the crop. Georgia alone grows close to half of the peanuts grown in the United States.
• A peanut is a legume. It is a relative of beans and peas, not of pecans or walnuts.

Table: the peanut growing cycle at a glance, from seed to harvest.

Stage	What happens	Roughly when
Planting	Seed kernels go about two inches deep into warm soil	April to May, after the last frost
Seedling	Green shoots break through the soil surface	About 10 days after planting
Flowering	Yellow flowers open low on the plant and self-pollinate	About 25 to 40 days after planting
Pegging	Pegs reach the soil and the pods start to form	About 8 to 12 days after pollination
Pod fill	Pods swell and mature underground while the plant keeps flowering	Through the summer
Harvest	Plants are dug, dried in the field, then combined	About 140 to 150 days after planting

Do Peanuts Grow on Trees?

No. A peanut plant is a low, bushy plant that reaches about 18 inches in height. It has green, oval leaves and small yellow flowers.

There is no trunk, no branch and nothing hanging overhead. The peanuts themselves are under the ground.

Some people picture them like potatoes, growing as part of the root. That is not right either. The pods grow from stalks that come down from the flowers above, which is what makes this plant so unusual.

Is a peanut a nut or a legume?

A peanut is a legume. It belongs to the same plant family as beans, peas and lentils. Cooks call it a nut because we eat it like one, and snack shelves group it with almonds and cashews. Botanically, though, it sits closer to the black-eyed pea.

If you want the full picture of what counts as a tree nut, our guide to what are tree nuts lays it out.

Why do so many people think peanuts grow on trees?

Because almost everything else in the nut aisle does. Pecans and walnuts hang from tall orchard trees. The peanut keeps its crop out of sight, so there is nothing to notice from the road. If you want to see how a true tree nut develops, read how do pistachios grow for a useful contrast.

How Are Peanuts Grown From Seed to Harvest?

The cycle has a clear order, and each stage depends on the one before it. Here is how peanuts are grown on a commercial farm in the United States.

1. The seedbed is prepared. Farmers till the soil first so that it is loose and rich enough for roots and, later, for the pegs to push through.
2. Seed goes in after the last frost. Planting runs from April into May, once the soil has warmed to about 65 to 70F. The seed is a peanut kernel saved from the previous year, set about two inches deep.
3. Seedlings appear. Green shoots break the surface about 10 days after planting and grow into a leafy plant.
4. Flowers open. Small yellow flowers show up near the base of the plant, usually within five to six weeks of planting.
5. Pegs push into the soil. Each pollinated flower sends a stalk toward the ground, and the pod starts to form beneath the surface.
6. Pods fill and mature. The plant keeps flowering while earlier pods thicken underground.
7. The crop is dug and dried. Harvest comes about 140 to 150 days after planting.

What happens in the first few weeks?

Not much that you can see. The seed sits in the warm soil, swells and sprouts. By about the tenth day a seedling cracks the surface. From there the plant puts on leaves and builds the roots it will need.

Planting time matters, which is why growers wait for the soil to warm to about 65 to 70F as well as for the last frost to pass.

When do the flowers appear?

Flowers usually open between 25 and 40 days after you plant, with the variety and the weather setting the pace. The flowers are small, yellow and easy to miss low in the leaves. Each flower is self-pollinating, so the plant does not rely on bees or wind to set a crop.

What Is Pegging, and How Do Peanuts Grow Underground?

Pegging is the step that sets the peanut apart from almost every other crop. Once a flower has pollinated itself, the petals fall away. The base of the flower then lengthens into a thin stalk called a peg.

That peg grows downward, away from the plant, until it reaches the soil. The tip carries the young embryo. It pushes in about an inch or two, turns to lie sideways, and swells into the familiar pod. Pegs usually enter the ground about 8 to 12 days after pollination.

Table: the main parts of a peanut plant and what each one does.

Plant part	Where it sits	What it does
Leaves and stems	Above ground	Collect light and carry the plant through the season
Yellow flower	Low on the plant, above ground	Pollinates itself, then drops its petals
Peg	Between the spent flower and the soil	Carries the embryo down and into the ground
Pod	Underground, usually an inch or two deep	Holds the kernels, which are the peanuts we eat
Roots with nodules	Underground	Host helpful bacteria that supply the plant with nitrogen

Why do some flowers never become peanuts?

The plant flowers over many weeks, but time runs out. In short-season areas, only the first 15 to 20 flowers or so make mature pods, because later pods do not have time to ripen.

A longer southern season gives the plant more room, and a healthy plant can end up with 40 or more pods.

What can go wrong during pegging?

Three things matter most at this stage:

• The peg has to reach soil. If it stays in the air or is not covered, the pod will not develop.
• The soil has to be loose. Heavy ground that packs hard or forms a crust can block the peg.
• Calcium has to be available. Peanuts need plenty of readily available calcium at pegging, so growers pay attention to it in the pegging zone.

Heat matters too. In very hot, dry regions growers manage the plant canopy and the moisture carefully, because a peg that meets scorching soil can die before the pod forms.

How Long Do Peanuts Take to Grow?

Most peanuts need four to five months from planting to harvest. In the main US growing belt that works out to about 140 to 150 frost-free days. Farmers count the days, but they also watch the weather, because heat drives the plant from one stage to the next.

Pegging begins roughly 45 days after the plants emerge, and the pod-filling weeks follow. By late summer the crop is mostly set and waiting on the fall.

Do all peanut types grow at the same speed?

No. Four market types are grown in the United States, and they differ in size, flavor and how long they take. Green peanuts picked for boiling are ready earlier, at about 90 to 110 days. Peanuts grown to be dried and roasted take around 130 to 150 days.

Table: the four peanut market types, how many kernels sit in a pod, and where each is mainly grown.

Type	Pod and kernel	Common use	Main growing area
Runner	Medium kernels of an even size	The most widely grown type, used in many snacks and spreads	Georgia, Alabama, Florida, Texas, Oklahoma
Virginia	Largest kernels, one to two per pod	Roasted in the shell, or shelled and salted	Southeastern Virginia, northeastern North Carolina
Spanish	Small kernels, two to three per pod	Candy, salted nuts and oil	Georgia, Oklahoma, Texas
Valencia	Small, sweet kernels, often three per pod	Roasted in the shell or boiled	New Mexico

Valencia types generally need a shorter season than Virginia types, which is why they suit areas with fewer frost-free days.

What Conditions Do Peanuts Need to Grow?

Peanuts are a warm-season crop. They want a long summer, light soil and steady moisture, and they are happy to look after their own nitrogen.

How much warmth and time do they need?

Planting waits until the soil is about 65 to 70F, and germination is best between roughly 68 and 95F. After that the plant needs around 140 to 150 frost-free days to finish a full crop. In a short or cool season, the crop may not reach full maturity.

What kind of soil works best?

Light, well-drained, sandy to sandy loam soil is the favorite. It lets roots spread, lets pegs slip in easily and drains after rain. A soil pH near 5.8 to 6.2 is typical, and lime or gypsum is sometimes added to supply calcium.

How much water do they need?

Peanut plants use about an inch and a half to two inches of water a week while the kernels are developing. Rain covers most of it. When rain falls short, farmers irrigate.

Why do peanuts need less fertilizer than other crops?

Because they are legumes. Their roots form small nodules that host bacteria. Those bacteria take nitrogen from the air and turn it into a form the plant can use. That is also why peanuts have long been rotated with other crops such as cotton, since they return nitrogen to the soil.

Rotation also helps with disease. Growers avoid following peanuts with beans, peas or other legumes, and planting after corn can reduce problems.

Where Do Peanuts Grow in the United States?

Peanuts are grown commercially in 13 states, stretching from Virginia down through Georgia and Florida, along the Gulf Coast, and west into Texas, Oklahoma and New Mexico. Six of them grow almost the entire crop.

Georgia leads by a wide margin and grows close to half of all US peanuts. Florida, Alabama, Texas, North Carolina and South Carolina follow. The states are usually grouped into three regions.

Table: the three main US peanut regions, their states and typical field timing.

Region	States	Typical timing and notes
Southeast	Georgia, Florida, Alabama, Mississippi	Planting from mid-April to late May. The largest share of the crop
Virginia-Carolina	Virginia, North Carolina, South Carolina	Planting from late April through May. Wet, humid summers
Southwest	Texas, Oklahoma, New Mexico, Arkansas	Planting late April to early May. Dry climate, so irrigation matters. Harvest runs from mid-September into October
Other states	Louisiana, Missouri	Grow only a small share of the national crop

Why is the crop centered in the South?

Climate does most of the work. The southern states give peanuts a long growing season and light soil. South Georgia is a good example, with a climate, soil and season that suit the crop well.

Where else in the world do peanuts grow?

Peanuts are native to South America and are now grown in the warm parts of Asia, Africa, Australia and the Americas. China, India and Nigeria grow the most, and the United States ranks fourth.

How Are Peanuts Harvested and Dried?

Harvest is the busiest stretch of the year, and it follows a set order. Because the crop is underground, it takes more steps than most field crops.

1. Wait for the right soil. The farmer waits until the ground is neither too wet nor too dry.
2. Dig the plants. A digger loosens each plant, cuts the main root and lifts it from the soil.
3. Turn them over. The plants are shaken to drop loose soil, then laid back down in rows called windrows, with the peanuts facing up and the leaves facing down.
4. Dry in the field. The pods stay in the windrows for two or three days. Freshly dug peanuts hold 25 to 50 percent moisture.
5. Combine. A combine separates the pods from the vines. The vines go back onto the field to feed the soil or are saved as livestock feed.
6. Finish drying. The pods go into wagons where warm air is pushed through them until moisture falls to about 10 percent or less, which allows safe storage.

Timing varies by region. In West Texas, one grower starts with Valencia types in mid-September and waits until around October 10 for the rest. In Oklahoma, harvest runs from late September into October.

How Can You Grow Peanuts at Home?

Home gardeners in warm regions can grow a few plants for fun. People searching how to grow peanuts or how to cultivate peanuts in a small plot usually need to focus on season length first. A garden needs roughly 110 or more frost-free days.

What do you need to start?

• Raw seed peanuts. Peanuts are grown from seed, not transplants. Buy raw peanuts meant for planting from a garden supplier.
• Warm, loose soil. Wait until the soil is above about 65F. Sandy ground is ideal, and compost can loosen heavier soil.
• The right depth. Plant about an inch and a half to two inches deep in clay, and two to three inches deep in sandy soil.
• Room to hill up. When plants are about a foot tall, pile around six inches of soil around them. That gives the pods space to develop.
• Steady water. About one to two inches a week keeps the plants even. Uneven watering can hurt the crop.

When do you dig them up?

Dig in the fall, when the leaves begin to yellow or after the first frost. Check the soil around each plant so you do not leave pods behind. Let the plants dry for one to two weeks in an airy spot, then pull the pods off and dry them for a few more weeks before storing or roasting.

Can you plant roasted peanuts from a snack bag?

No, roasted or blanched peanuts will not sprout. The roasted peanuts we pack are for snacking. For a garden or a school project, use raw seed peanuts.

What Does the Growing Cycle Mean for the Peanuts You Buy?

Knowing how peanuts grow changes how you read a snack bag. The long season, the underground pods and the careful drying all sit behind every handful. After harvest, peanuts are shelled and processed into the snacks we know, and that is where we come in.

Which peanut snacks do we pack?

Our peanut range is built around roasted peanuts. Butter toffee peanuts are roasted peanuts coated in a thin, crackly toffee glaze, and they come in three bag sizes. For hosting, our sweet and savory bar mix combines toffee peanuts and spicy honey roasted peanuts with smoked almonds and pretzels. Our butter toffee mixed nuts put peanuts in the same bag as almonds, pecans and cashews.

Peanuts also show up in gifts. Our round wooden fruit and nut gift tray includes honey roasted peanuts and toffee peanuts alongside dried fruit, and the tray can be kept and reused. Browse more ideas in our mixed nuts and bar mix collection.

When do people reach for peanut snacks?

Peanuts fit a lot of moments. They travel well on a road trip, sit easily in a lunchbox and suit a game night bowl. Holiday guests and family get-togethers are a natural fit, especially when the bowl needs to cover sweet and savory tastes.

If one of your guests has an allergy, check the allergen statement first. A peanut is a legume, not a tree nut, but it is a common allergen, and our products are packed in a facility that handles both peanuts and tree nuts.

How should you store peanut snacks?

Press the zipper closed after every use and keep the bag in a cool, dry place away from heat and direct sunlight. Glazed peanuts can pick up moisture from the air, so a bag left open in a humid kitchen may turn sticky. Our guide on how to store nuts has more detail, and roasted vs raw nuts explains the difference in the bag.

What Are the Most Common Questions About How Peanuts Grow?

How do peanuts grow?

A peanut seed is planted in warm soil in spring and grows into a leafy plant about 18 inches tall. Yellow flowers open above ground, pollinate themselves and drop their petals. A short stalk called a peg then bends down and pushes into the soil, and the pod swells underground. Farmers dig the plants up about four to five months after planting.

Do peanuts grow on trees?

No. Peanuts grow on a low, bushy plant, and the pods form under the soil. Pecans, walnuts and almonds grow on trees. The peanut belongs to the legume family, alongside beans and peas, which is why it grows so differently.

Where do peanuts grow in the United States?

Commercial peanuts are grown in 13 southern and southwestern states. Six states grow nearly all of the crop: Georgia, Florida, Alabama, Texas, North Carolina and South Carolina. Georgia grows close to half of the national total.

How long does it take a peanut to grow?

From planting to harvest, the cycle runs about four to five months, or roughly 140 to 150 days. Green peanuts for boiling are ready sooner, at about 90 to 110 days. The exact time depends on the peanut type, the variety and the weather that season.

How many peanuts does one plant produce?

One healthy plant can produce 40 or more pods. The plant keeps flowering over a long stretch, so pods form at different times. Not every flower becomes a pod, because later flowers may not have time to mature before the season ends.

What Else Do People Ask About Growing and Harvesting Peanuts?

What is a peanut peg?

A peg is the thin stalk that grows from the base of a pollinated flower. It bends toward the ground, pushes about an inch or two into the soil and turns sideways. The tip then swells into the pod. If a peg never reaches the soil, the pod does not form.

How are peanuts harvested?

When the plants are mature and the soil is neither too wet nor too dry, a digger lifts the plants and lays them in rows with the pods facing up. They dry in the field for a few days. A combine then separates the pods from the vines, and the pods finish drying in wagons with warm air.

Can you grow peanuts at home?

Yes, if your season is long enough. Home gardeners need roughly 110 or more frost-free days, warm soil, loose sandy ground and steady moisture. Start from raw seed peanuts, plant them about an inch and a half to three inches deep, shallower in clay, and dig the plants in the fall when the leaves start to yellow.

Can you plant roasted peanuts from a snack bag?

No. Roasted peanuts will not sprout, so the roasted and glazed peanuts we pack are for eating, not planting. For a garden or a classroom project, buy raw seed peanuts from a garden supplier.

Why are most peanuts grown in the South?

Peanuts need a long, warm season, with about 140 to 150 frost-free days, and they do best in light, well-drained soil. The southeastern states offer that combination, along with enough rain or irrigation during the weeks when pods are filling.

About the Author

This guide was written by the team at Nut Cravings, a nut and dried fruit business packing and shipping snack nuts, seeds, dried fruit and gift trays across the United States. We pack the roasted peanuts and peanut blends that grow from the plants described here.

See the full range in our peanuts collection or browse all nuts and seeds.