Best Soil for Peanuts and Why Calcium (Gypsum) Matters
The soil peanuts need, pH, why calcium is essential for pod fill, when to apply gypsum, and fertilizing peanuts.
Peanuts grow best in loose, well-drained sandy loam with a pH of about 5.8–6.5. Because pods absorb calcium directly from the soil around them, calcium in the top few centimetres is critical; without it you get empty pods ("pops") and dark plumules.
Gypsum
Apply gypsum (calcium sulfate) at early flowering over the row, typically 500–1,000 kg/ha, especially for large-seeded Virginia types and in sandy soils. In gardens, about 100–200 g per square metre.
Fertilizer
- Peanuts are legumes and fix nitrogen; little N needed.
- Phosphorus and potassium according to soil test, applied before planting.
- Avoid excess potassium in the pegging zone; it reduces calcium uptake.
- Inoculate in fields new to peanuts.
More Peanut Guides
- How to Grow Peanuts: The Complete Guide
- Peanut pests and diseases
- When to harvest and cure peanuts
- Peanut yield
Frequently Asked Questions
Why are my peanut shells empty?
Usually calcium deficiency or drought during pod fill.
What soil is best for peanuts?
Light, sandy, well-drained soil that stays loose.
TarlaTapan guides focus on practical, field-tested growing advice. Corrections and suggestions are welcome at info@tarlatapan.tr.