Garden calculator
Plant Spacing Calculator
Plant Spacing Calculator. Use the actual product label and your measured quantities. Starting values are editable examples, not universal rates or product specifications. Keep the units beside each input.
Method and practical checks
- Density is an editable product or design input. Round the plant requirement up before rounding to packs.
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Your measurements and assumptions
Use the actual product label and your measured quantities. Starting values are editable examples, not universal rates or product specifications. Keep the units beside each input.
| Planting area | 15 | m² |
|---|---|---|
| Bulbs per area | 45 | bulbs/m² |
| Extra allowance | 10 | % |
| Pack size | 25 | bulbs |
Method and assumptions
density_estimate = area_m2 / (spacing_m**2); grid-fit count needs actual width and length
Count centres that fit within the usable length and width. Alternate staggered rows shift by half the plant spacing; the row spacing remains your input.
Including both ends places the first and last plants at the run boundaries when spacing permits. Double rows multiply the count; check the species’ spacing.
Density is an editable product or design input. Round the plant requirement up before rounding to packs.
Example with the selected inputs
- Required quantity: 743 bulbs
- Packs to buy: 30
- Purchase quantity: 750 bulbs
- Left over: 7 bulbs
Change the inputs to match your own task. Whole packages are rounded up after allowances, so purchase quantity and actual requirement can differ. Apply each allowance once.