Bulb Spacing Calculator
Determine the number of bulbs needed for a garden bed based on area and planting pattern.
Input Parameters
Enter details for calculation.
Bulbs Required
Expert Tip
Planting bulbs in a triangular layout provides a more natural, dense, and fuller appearance in the spring compared to a rigid grid pattern.
Calculation Methodology & Details
Formula
For triangular spacing, the vertical row spacing is reduced by a factor of sqrt(3)/2 (~0.866) to offset alternating rows. This yields roughly 15.5% more planting density.
Important Disclaimer
The calculations provided are for educational and general planning guidelines only. They do not replace professional agronomic advice or certified agricultural testing.
How to Determine Bulb Quantities
Follow these steps to calculate requirements:
Measure Bed
Measure the length and width of the garden bed area.
Select Spacing
Look up the spacing recommendations for your specific bulb (typically 4-6 inches for tulips).
Choose Pattern
Choose a grid pattern for straight rows or triangular for a dense massing.