Calculate square footage (ft2) for each of your planting beds.
- rectangle/square = length x width
- triangle = ½ base x height
- circle = 3.14 x radius2 (radius is the distance from center of circle to the edge)
Multiply the square footage of the planting bed by the plants needed per square foot to determine the number of plants needed. If you are using plants with different spacing requirements in the same area, estimate the square footage for each of the different plant types.
Recommended Spacing (inches) : Number of plants/square feet
- 6 inches: 4 ft2
- 8 inches: 2.3 ft2
- 10 inches: 1.4 ft2
- 12 inches: 1 ft2
Example: A 100 square foot garden, using plants with a recommended spacing of 8 inches would require 230 plants to fill in the area properly (100 x 2.3=230). Once the total number is determined, add about 10% to cover losses.