Plant Spacing In A Row Calculator

Work out plant spacing in a row instantly with clear inputs, formula shown and shareable results.

About Plant Spacing In A Row Calculator

Plants in a row is the usable length divided by spacing plus one, because both ends get a plant. Recalculating the actual spacing from the whole number of plants distributes any remainder evenly rather than leaving a gap at one end.

Formula

Row spacing

plants = floor((length - 2 x margin) / spacing) + 1; actual spacing = usable length / (plants - 1)

Worked example

With the default values below, Plant Spacing In A Row Calculator returns Plants per row of 40. Change any input above and every figure here is recalculated in your browser.

Inputs used

Row length: 12 m
Spacing between plants: 30 cm
Margin at each end: 15 cm
Number of rows: 4 rows

Results

Plants per row: 40 plants
Total plants: 160 plants
Actual spacing achieved: 30.00 cm
Row length used: 11.70 m

Step by step

1Values used
2Row spacing
3Plants per row= 40 plants
4Total plants= 160 plants
5Actual spacing achieved= 30.00 cm
6Row length used= 11.70 m

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why add one plant?

Spacing describes the gaps, and n plants have n-1 gaps. Forgetting this leaves the last plant off the end of every row.

Should spacing match the mature size?

For permanent planting yes. For annual vegetables, close spacing suppresses weeds and is standard even though plants touch at maturity.