Seed Spacing
Find how many plants fit a bed from row and in-row spacing.
About Seed Spacing
Multiplying the plants along each row by the number of rows that fit the bed gives the total for the space. Spacing controls light, airflow and root room, so the same bed grows far more when gaps are matched to plant size.
Formula
Seed Spacing
Plants per row = row length x 12 / in-row spacing; density = 144 / (row x in-row spacing)
- in-row spacing
- Gap between seeds along the row
- rows
- Beds one foot wide
Worked example
With the default values below, Seed Spacing returns Plants per Row of 20. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Row lengthminimum 1 ft
- 10 ft
- Row spacingminimum 1 in
- 18 in
- In-row spacingminimum 0.1 in
- 6 in
Results
- Plants per Row
- 20
- Rows in 12 ft
- 1
- Total Plants
- 20
- Density
- 1.33 /sq ft
Step by step
- 1Values used
- 2Seed Spacing
- 3Plants per Row= 20
- 4Rows in 12 ft= 1
- 5Total Plants= 20
- 6Density= 1.33 /sq ft
Assumptions and limits
- The result is derived only from the 3 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
How is Seed Spacing calculated?
Plants per row = row length x 12 / in-row spacing; density = 144 / (row x in-row spacing) Multiplying the plants along each row by the number of rows that fit the bed gives the total for the space.
Why does Seed Spacing matter?
Spacing controls light, airflow and root room, so the same bed grows far more when gaps are matched to plant size.
What values do I need to enter?
This calculator takes 3 inputs: Row length, Row spacing, In-row spacing. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.