Seedlings per Hectare Calculator
Calculate how many seedlings fit in one hectare from the spacing between rows and plants. Plan planting and seedling purchases for your crop.
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Seedlings per hectare from spacing
To get seedlings per hectare you use pl/ha = 10,000 / (row spacing · in-row spacing), both spacings in meters and the 10,000 standing for the m² in a hectare. Some Brazilian benchmarks worth keeping in mind: eucalyptus 3 × 2 m = 1,667 pl/ha, coffee 3 × 1 m = 3,333 pl/ha, soybean 0.50 × 0.05 m = 400,000 pl/ha, corn 0.80 × 0.20 m = 62,500 pl/ha. Take 3 m between rows and 2 m within the row and you land on 10,000 / 6 ≈ 1,667 pl/ha. Swap the species or the management and the same field ends up holding wildly different plant counts.
Applications
It shows up in silviculture (eucalyptus, pine), in row-crop agriculture, across INCRA agrarian reform settlements, in EMBRAPA cultivar recommendations, and whenever someone budgets a seedling purchase for a reforestation project.
FAQ
Why does eucalyptus use such low density? The crowns need room to spread if the trees are going to build wood volume. That's why 1,667 pl/ha is the usual figure for sawmill-grade timber, while stands grown for charcoal push past 2,000 pl/ha.
Does the formula account for borders and roads? No, what you get is the theoretical population. In real planning you'll want to knock off 5–10% for carreadores (internal roads) and the field edges.
Where do I find recommended spacing? Technical bulletins from EMBRAPA, IBÁ (silviculture) and Embrapa Café list recommended spacing broken down by region, soil and what the crop is grown for.
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The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.