Calculate optimal planting density for any crop. Get plants per acre, per hectare, and total seed quantities instantly.
Field corn for grain production
Distance between rows
Distance between plants within a row
Plants aligned in a standard grid pattern.
Percentage of seeds expected to successfully germinate.
Weight per individual seed, used to estimate total seed weight needed.
Plant population = (Area ÷ (Row spacing × Plant spacing)), adjusted for pattern and germination rate.
Plants/m² = 1 / (row spacing × plant spacing)
1 hectare = 10,000 m² · 1 acre = 4,046.86 m²
Rectangular planting places plants in a grid pattern with equal spacing. Triangular (offset) planting staggers every other row by half the plant spacing, fitting approximately 15% more plants in the same area while maintaining similar spacing between individual plants.
Optimal plant spacing depends on crop type, variety, soil fertility, and climate. Corn typically uses 30-inch rows with 6-8 inch plant spacing. Consult seed company recommendations and local extension services for variety-specific guidance.
Germination rate is the percentage of seeds that successfully sprout and establish plants. A 90% germination rate means you need to plant about 11% more seeds than your target population. Most commercial seed has 85-95% germination depending on the crop.
Modern corn hybrids perform best at 30,000-36,000 plants per acre (74,000-89,000 per hectare) in the US Corn Belt. Optimal density varies by hybrid, soil type, and growing conditions. Higher populations work best in high-yield environments with adequate moisture.
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