Peanut
Arachis Hypogaea
Arachis hypogaea, commonly known as the peanut or groundnut, is a unique legume that grows underground. Originating from South America, it is cherished for its edible seeds and is a staple crop in many regions. Peanuts are not only delicious but also enrich the soil with nitrogen, making them a beneficial addition to any garden.
Everything it needs
9 essentials at a glance
Watering
Peanuts require consistent moisture, especially during germination and pod development.
Water the plants deeply once a week, providing about 1 inch of water. During dry spells, increase watering frequency. Signs of over-watering include yellowing leaves and root rot, while under-watering can cause wilting and stunted growth.
Light
Peanuts thrive in full sun, requiring at least 6-8 hours of direct sunlight daily.
Ideal placement is in a south-facing garden bed or container where they can receive maximum light. They can tolerate partial shade but will produce fewer pods.
Soil
Peanuts prefer sandy loam or well-draining soil with a pH of 5.8 to 6.2.
The soil should be rich in organic matter to support healthy growth. Ensure good drainage to prevent waterlogging, which can harm the roots. A recommended potting mix includes compost and sand.
Humidity
Peanuts prefer moderate humidity levels around 40-60%.
To increase humidity, mist the plants or place a humidifier nearby. If humidity is too low, leaves may become crispy and dry. Conversely, excessive humidity can lead to fungal diseases.
Temperature
Peanuts thrive in warm temperatures, ideally between 70-85°F (21-29°C).
They are sensitive to frost and should be planted after the last frost date. They are best suited for USDA hardiness zones 8-11, as they cannot tolerate cold temperatures.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 5-10-10, applying it at planting time and again when the plants are 6 inches tall.
Fertilize every 4-6 weeks during the growing season. Signs of nutrient deficiency include yellowing leaves and poor pod development.
Pruning
Pruning is not typically necessary for peanuts, but removing any dead or diseased leaves can improve air circulation.
Use clean, sharp scissors or pruning shears for any cuts. Deadheading is not applicable as peanuts produce pods underground.
Repotting
If growing in containers, repot when the plant outgrows its pot, usually every 1-2 years.
Signs it needs repotting include roots emerging from the drainage holes and stunted growth. Choose a pot 2 inches larger in diameter and follow standard repotting procedures.
Propagation
Peanuts are typically propagated from seeds.
Plant seeds 1-2 inches deep in well-prepared soil after the last frost. Space seeds 4-6 inches apart in rows that are 24-36 inches apart. Germination usually occurs within 7-10 days. For best results, plant in late spring.
When it's unhappy
Yellow leaves
Why it happens
This can be caused by over-watering, nutrient deficiency, or pest infestations.
How to fix it
Check soil moisture levels, adjust watering practices, and apply a balanced fertilizer if needed. Inspect for pests and treat accordingly.
Root rot
Why it happens
Root rot occurs due to excessive moisture and poor drainage.
How to fix it
Ensure proper drainage and reduce watering frequency. Remove affected plants and amend the soil with sand to improve drainage.
Pest infestations
Why it happens
Common pests include aphids and spider mites that can damage leaves and reduce yield.
How to fix it
Inspect plants regularly and treat infestations with insecticidal soap or neem oil.
Poor pod development
Why it happens
This can result from inadequate pollination or nutrient deficiencies.
How to fix it
Ensure proper spacing for airflow and pollination, and apply a fertilizer high in potassium to support pod formation.
Wilting plants
Why it happens
Wilting can indicate either under-watering or root issues.
How to fix it
Check soil moisture and adjust watering accordingly. If the soil is wet, inspect roots for rot.
Care through the year
Spring
In spring, prepare the soil by tilling and adding organic matter. Plant seeds after the last frost date when soil temperatures are warm.
Summer
During summer, ensure consistent watering and monitor for pests. Fertilize every 4-6 weeks to support growth and pod development.
Fall
In fall, watch for yellowing leaves as a sign of readiness for harvest. Begin harvesting when pods are fully developed and leaves start to die back.
Winter
In winter, if grown in containers, move them indoors to protect from frost. If planted in the ground, cover with mulch to insulate the soil.
Toxicity & Safety
Peanuts are generally non-toxic to pets and children. However, some individuals may have allergies to peanuts, which can cause severe reactions. Symptoms of ingestion in allergic individuals include hives, swelling, and difficulty breathing.
Good to know
How often should I water my peanut plants?
Water your peanut plants deeply once a week, or more frequently during dry spells, ensuring they receive about 1 inch of water weekly.
What type of soil is best for growing peanuts?
Peanuts thrive in sandy loam or well-draining soil with a pH of 5.8 to 6.2, enriched with organic matter for optimal growth.
When is the best time to plant peanuts?
Plant peanuts in late spring after the last frost date when soil temperatures are consistently above 70°F (21°C) for best germination.
Why are my peanut plants wilting?
Wilting can be a sign of under-watering or root rot. Check soil moisture and adjust your watering schedule accordingly.
How can I increase humidity for my peanut plants?
To increase humidity, mist the plants regularly or use a humidifier nearby, especially during dry conditions.
What pests should I watch for on peanut plants?
Common pests include aphids and spider mites. Regularly inspect your plants and treat infestations promptly with insecticidal soap.
How do I know when to harvest my peanuts?
Harvest peanuts when the leaves start to yellow and die back, usually 120-150 days after planting. Gently dig up the plants to check for pod development.
Grows well with
Track this plant in your garden.
Set care reminders, log growth, and join a community of plant lovers.