Bulb Spacing Calculator

A bulb spacing calculator determines how many flower bulbs are needed to fill a bed, based on area and recommended spacing. Proper spacing allows bulbs to multiply and ensures a full, even display

The calculator uses the standard published formula for bulb spacing. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with pounds, inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Bulbs per row = Area width / Spacing. Each step in the calculation is shown so you can verify the result manually.