Plant Population and Row Spacing Calculator
Connects plant population, row spacing and in-row spacing, and works out the one you do not have.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
plants per ha = 10,000 ÷ (row spacing × in-row spacing), both in metres row spacing = 10,000 ÷ (plants per ha × in-row spacing)
Each plant has a rectangle of ground, row spacing by in-row spacing. The same relationship rearranges to give whichever figure is missing.
What to watch out for
These are plants, not seeds. To plan seed, allow for germination and establishment on the seed rate calculator. The right population depends on the crop, variety and water, so take the target from local advice.
Frequently Asked Questions
How many plants per hectare at 75 cm rows and 15 cm spacing?
88,889 per hectare, or 35,972 per acre.
What row spacing should I use?
It usually follows the crop and your machinery, since drills, planters and harvesters come with fixed widths. Decide it first, then set the in-row spacing to hit the population.