Plant Spacing Calculator Widget
Gardeners and growers can find out how many plants fit in a bed or field at a given spacing, or how far apart to set the plants they already have. Square grids, offset (triangular) grids and row planting are all covered, in centimetres and square metres or inches and square feet.
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Under the widget on your page: Powered by A2Z Tools
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<iframe src="https://a2z.tools/embed/w/plant-spacing-calculator" title="Plant Spacing Calculator by A2Z Tools" width="100%" height="480" style="border:0;width:100%" loading="lazy" allow="clipboard-write"></iframe>
A plain iframe. Works everywhere, including site builders that strip scripts. Adjust height if your content needs more room.
<div data-a2z-widget="plant-spacing-calculator" data-height="480"></div> <script async src="https://a2z.tools/embed.js"></script>
Adds a small script (what it does) that sizes the widget to fit its content, loads it lazily and keeps it isolated from your page's CSS.
Works with
How it works
Each plant occupies a share of the ground. On a square grid that share is the spacing squared, so plants 30 cm apart each take 0.09 m2 and a 10 m2 bed holds 111. On a triangular, or offset, grid every plant is the same distance from six neighbours and the rows are closer together, so each plant takes only 0.866 times the spacing squared - 15.5% more plants (factor 1.1547) at the same spacing, 128 instead of 111 in the example. In row planting the area per plant is the row spacing multiplied by the in-row spacing: 75 by 20 cm gives 66,667 plants per hectare. The reverse mode divides the number of plants by the area to get a density and solves for the spacing: 100 plants in 10 m2 need 31.6 cm on a square grid, 34.0 cm on a triangle or 13.3 cm within 75 cm rows. Plant counts are rounded down, since part of a plant cannot be planted.
Calculation method
- Area per plant: square = s^2; triangular = s^2 x sin 60 = 0.866 s^2; rows = row spacing x in-row spacing
- Plants = area / area per plant (rounded down); density per m2 = 1 / area per plant
- Inverse: square s = sqrt(1 / density); triangular s = sqrt(1 / (0.866 x density)); rows in-row = 1 / (density x row spacing)
- 1 in = 2.54 cm; 1 ft2 = 0.0929 m2; 1 acre = 43,560 ft2; 1 ha = 10,000 m2
Worked examples
Offset planting in a 10 m2 bed
Inputs: Triangular grid; 30 cm spacing; 10 m2
Result: 128 plants; 12.83 per m2; 128,300 per ha
10 / (0.866 x 0.09) = 128.3; a square grid gives 111.
Spacing for 100 plants
Inputs: Square grid; 100 plants; 10 m2
Result: 31.6 cm apart; 10 per m2
sqrt(10 m2 / 100) = 0.316 m.
Limitations
- Pure geometry: it does not know the recommended spacing for any plant variety.
- Irregular bed shapes and edge margins reduce the real count.
Where publishers use it
- A nursery's product page for ground-cover plants sold by the tray
- A vegetable-gardening blog explaining square-foot and offset planting
- A landscape designer's planting-plan guide for hedges and mass plantings
- A vineyard or orchard establishment page estimating trees per hectare
- A horticulture class lesson on planting geometry
Questions
Why does a triangular layout fit more plants?
Offsetting alternate rows by half a spacing lets them sit closer: the row-to-row distance becomes 0.866 of the plant spacing while every plant still has the same distance to its neighbours. The result is 1.1547 times as many plants - about 15.5% more - on the same area.
How many plants per hectare at 75 cm rows and 20 cm in the row?
Each plant occupies 0.75 x 0.20 = 0.15 m2, so a hectare (10,000 m2) holds 66,667 plants. The widget shows the same figure per acre when imperial units are selected (26,980 per acre).
How do I work out the spacing for the plants I already bought?
Choose 'Spacing from plants needed', enter the number of plants and the bed area. For 100 plants in 10 m2 the square-grid spacing is 31.6 cm; an offset grid lets you space them 34.0 cm apart.
Do the counts include a border?
No. They assume the spacing pattern fills the whole area. If plants must stay half a spacing inside the bed edge, a small bed holds noticeably fewer - work out the inner area and enter that.
Is a square grid better than rows?
Rows leave access paths for weeding, harvesting and machinery; grids and offset patterns maximise plants per area and close the canopy evenly. Choose by how the area is managed, not just by the count.
Cite or recommend this tool
If you reference this tool in an article, course or documentation, these formats are ready to copy. They are optional - nothing is added to your site unless you paste it.
A2Z Tools Plant Spacing Calculator https://a2z.tools/embed/plant-spacing-calculator
<a href="https://a2z.tools/embed/plant-spacing-calculator">A2Z Tools Plant Spacing Calculator</a>
[A2Z Tools Plant Spacing Calculator](https://a2z.tools/embed/plant-spacing-calculator)
Plant Spacing Calculator by A2Z Tools - https://a2z.tools/embed/plant-spacing-calculator
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