Tree Spacing Calculator
Two Different Planting Geometries, Two Different Formulas
Spacing plants along a single row — a hedge, a windbreak, a line of street trees — is a different geometry problem than filling an open area with an even grid, and conflating the two leads to either wasted plants or awkward gaps. This calculator handles both cases: a linear row calculation for hedges and property-line plantings, and an area-based grid calculation for orchards, ground cover, or mass plantings.
The Formula
Plants Needed = floor(Row Length ÷ Spacing) + 1
Grid (area) planting:
Area per Plant = Spacing²
Plants Needed = floor(Area ÷ Area per Plant)
In row mode, the "+1" places a plant at both ends of the row, not just at each interval. In grid mode, each plant claims a square of ground equal to the spacing squared, on the assumption of an even square grid layout in both directions.
Where This Matters
- Hedges and privacy screens — row-mode spacing determines how many shrubs are needed to form a continuous screen along a property line or fence.
- Orchards and mass plantings — grid-mode spacing is standard for laying out fruit trees, vineyard rows, or large-scale ground cover, where mature spread dictates how far apart each plant needs to be to avoid overcrowding.
- Balancing density against mature size — wider spacing means fewer plants and lower upfront cost, but a longer wait for a filled-in look; tighter spacing fills in faster but risks overcrowding as plants mature.
| Row length | 3 ft spacing | 6 ft spacing | 10 ft spacing |
|---|---|---|---|
| 50 ft | 17 | 9 | 6 |
| 100 ft | 34 | 17 | 11 |
| 200 ft | 67 | 34 | 21 |
| Spacing | Area per plant | Plants needed |
|---|---|---|
| 3 ft | 9 sq ft | 111 |
| 6 ft | 36 sq ft | 27 |
| 10 ft | 100 sq ft | 10 |
| 15 ft | 225 sq ft | 4 |
How to Use This Calculator
- Choose the planting mode: row (a single line) or area (a grid).
- Enter the spacing between plants in feet.
- For row mode, enter the row length in feet; for area mode, enter the total area in square feet.
- Select Calculate for the number of plants needed.
Related Calculations
Enclosing the planting area? See the Fence Length Calculator, or check the Irrigation Coverage Calculator to plan watering for new plantings.