How to Grow Groundnut, Spanish
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Groundnut, Spanish
Arachis hypogaea subsp. hypogaea var. vulgaris
vegetableSpanish peanuts are a variety of groundnut characterized by smaller kernels and higher oil content compared to other peanut types. These legumes develop their fruit underground after the flower stem (peg) penetrates the soil. Spanish peanuts are prized for oil production, snacking, and confectionery uses.
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Example Groundnut, Spanish timeline · Pittsburgh, PA (Zone 6b)
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Plant Groundnut, Spanish
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Groundnut, Spanish
Around Aug 15≈ 120 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Groundnut, Spanish dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-11; requires warm growing season with 4-5 frost-free months
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Get my Groundnut, Spanish timeline →Growth Stages
Germination & Seedling
10-14 daysSeeds sprout and emerge with cotyledons; first true leaves appear within 7-10 days
Keep soil consistently moist but not waterlogged; maintain soil temperature above 65°F; protect from birds and insects
Vegetative Growth
30-45 daysPlant develops compound leaves and branching stems; bushy growth pattern; plant becomes established
Monitor for weeds and control early; maintain consistent soil moisture; apply balanced fertilizer if needed; watch for pest activity
Flowering
40-60 daysSmall yellow or orange flowers appear in leaf axils; flowering occurs over several weeks in succession
Maintain steady moisture during this critical period; avoid excess nitrogen which reduces flowering; flowers are self-pollinating; watch for thrips and spider mites
Peg Formation & Pod Development
50-70 daysAfter pollination, flower stem (peg) elongates and penetrates soil; underground, pods develop containing 1-3 kernels; peg development takes 7-10 days
This is critical—ensure loose, well-draining soil for peg penetration; maintain moderate soil moisture; mulch lightly to keep soil soft; avoid compacted soil; provide gypsum for calcium
Maturation & Harvest Ready
20-30 daysPods fully develop underground; shells harden; inner kernel skins darken; plant leaves may yellow slightly
Reduce watering gradually; stop watering 2-3 weeks before harvest; watch for mature pod color (brown/tan); dig carefully to avoid damaging pods
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray neem oil or insecticidal soap during flowering; remove affected flowers; encourage beneficial insects like ladybugs
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Increase humidity; spray with water; use miticide if severe; apply neem oil
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Spray with insecticidal soap or neem oil; release ladybugs; avoid over-fertilizing with nitrogen
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Ensure good air circulation; avoid overhead watering; remove affected leaves; apply fungicide if necessary; practice crop rotation
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Ensure pods dry properly post-harvest; maintain proper soil moisture during growth; harvest at right maturity; store in cool, dry place
Uses
Oil Production & Cooking
CulinarySpanish peanuts have higher oil content (48-50%) than other varieties, making them ideal for cold-pressed peanut oil, cooking oil, and refined oil production. The oil is versatile for frying, roasting, and salad dressings. [source]
Snacking & Confectionery
CulinarySpanish peanuts are popular for roasting and salting as snacks, peanut butter production, candy coating, and chocolate-covered peanuts due to their small size and sweet flavor. [source]
Livestock Feed & Meal
HouseholdPeanut meal and hulls are nutrient-rich livestock feed for cattle, poultry, and swine. The protein-rich meal is a valuable byproduct of oil extraction. [source]
Nutritional & Health Benefits
MedicinalSpanish peanuts are rich in protein, fiber, magnesium, and resveratrol. Regular consumption is associated with heart health, improved cholesterol levels, and weight management. [source]
Agricultural Rotation & Soil Health
CraftAs a legume, groundnuts fix nitrogen in the soil, improving soil fertility for subsequent crops and reducing the need for synthetic nitrogen fertilizers in sustainable farming systems. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest when leaves begin to yellow and dry, typically 4-5 months after planting. Carefully dig entire plant to avoid breaking pods underground. Shake off soil and hang plants upside down in a warm, well-ventilated area for 2-3 weeks to dry. Pod interior should be dark brown and kernels fully mature before shelling. Typical yield: 3,000-4,500 lbs per acre (or 2-3 lbs per 10 sq ft for home gardens)
Fun Facts
- 🌱 Peanuts are botanically legumes (like beans and peas), not true nuts, and develop their fruit uniquely underground after the flower stem (called a peg) pushes into the soil.
- 🌱 Spanish peanuts account for only 6-8% of U.S. peanut production but are prized globally for their superior oil content and use in premium peanut butter and confectionery products.
- 🌱 The plant was originally domesticated in South America (likely Argentina or Bolivia) over 7,000 years ago, and Spanish conquistadors introduced it to Africa and Asia in the 16th century, making it a truly global crop.
Gardening Terms
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