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Plant guide

Peanut.

Arachis hypogaea

Pronounced uh-RACK-iss hy-poh-JEE-uh

Also known as Earth Nut, Ground-Nut, Monkey Nut, Peanut, Pindar

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Peanuts are fascinating legumes that actually grow their pods underground after flowering. They love warm weather and plenty of sunshine to thrive. You will enjoy watching the yellow flowers bloom before the pegs push into the soil.

At a glance

Care level
Moderate
Plant type
Annual legume
Light
Full sun
Indoor light
Direct sun
Water
Every 3 to 7 days
Mature size
1 to 2 feet
Growth rate
Fast
Hardiness
USDA 9 to 11
Bloom time
Mid to late summer

Care

Keep the soil consistently moist while the plant is flowering and setting pods. Watch for yellowing leaves which might suggest poor drainage or nutrient issues. Ensure the plant receives full sun for the best harvest.

Watering
Water deeply whenever the top inch of soil feels dry to the touch.
Feeding
Apply a low nitrogen fertilizer once a month during the active growing season.
Pruning
Pruning is generally not required for peanuts unless you need to remove dead or damaged foliage.
Repotting
Peanuts are annuals and are typically grown in the ground or large containers for a single season.
Soil
Sandy loam
Soil pH
5.8 to 6.5
Temperature
15 to 35°C
Humidity
40 to 70%

Safety

People
The plant is generally non-toxic, but the seeds are a major allergen for many people.
Children
Peanuts are a significant choking hazard for small children.
Contact allergens
None notable.
Airborne allergens
Peanut dust can trigger allergic reactions in sensitive individuals.
Edibility
People with a peanut allergy must avoid peanuts in all forms, raw or roasted, and harvested peanuts must be properly cured to prevent mold growth.

How to identify it

  • Yellow pea like flowers
  • Compound leaves with four leaflets
  • Low growing bushy habit
  • Underground seed bearing pods
Height
0.3 to 0.6m
Spread
0.3 to 0.9m
Leaves
green, deciduous
Flowers
yellow, 1 to 2cm
Fruit
tan, Late summer to autumn

Problems to watch for

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    Growing it

    Propagation
    seed
    When to plant
    Spring

    Plant them alongside heavy feeders to take advantage of the nitrogen they add to the soil.

    Grows well with

    • Corn · Peanuts fix nitrogen that helps the corn grow.
    • Radish · They grow quickly and do not compete for space.

    Similar species

    • Bambara groundnut · Another legume that produces its fruit underground.

    Science

    Family
    Fabaceae
    Genus
    Arachis
    Order
    Fabales
    Class
    Magnoliopsida
    Native range
    South America
    Conservation
    Not of conservation concern as it is a widely cultivated crop.

    It thrives in warm, sunny climates with well-drained soil and fixes nitrogen in the ground.

    Value to wildlife
    nectar source
    Pollinators
    bees
    Uses
    culinary, cover crop, oil production

    Through the year

    JFMAMJJASOND
    Flowering
    Fruiting
    Foliage

    Ecological indicators

    Salinity
    2/9
    Soil reaction
    6/9
    Light
    8/9
    Temperature
    8/9
    Moisture
    5/9
    Nutrients
    4/9

    Taxonomy resolved against GBIF.

    Questions people ask

    Can I grow peanuts in a pot?
    Yes, they grow well in deep containers with loose, sandy soil.
    When do I harvest them?
    Harvest when the foliage begins to yellow and wither, usually from late summer to mid autumn and before the first frost.

    Where the name comes from

    The genus name Arachis comes from the Greek word for a weed, while the species name hypogaea means under the earth.

    Good to know

    • Peanuts are not actually nuts but legumes related to beans and lentils.
    • The flowers self-pollinate above ground before the stem elongates to push the ovary into the soil.
    • Peanuts were once used as a primary source of light in oil lamps.
    • George Washington Carver promoted peanuts as a soil-improving crop for farmers.

    Keep your peanut growing

    This page is a general guide. Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked.

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    This guide was generated with AI on and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.