Plant Calculator
How Many Plants Do You Need?
| # of Plants |
On Center Spacing of Plants |
||||||
|
8" |
10" |
12" |
15" |
18" |
24" |
||
|
Coverage Area in Square Feet |
25 |
57 |
36 |
25 |
16 |
11 |
6 |
|
50 |
114 |
72 |
50 |
32 |
22 |
12 |
|
|
75 |
171 |
108 |
75 |
48 |
33 |
18 |
|
|
100 |
228 |
144 |
100 |
64 |
44 |
24 |
|
|
150 |
342 |
216 |
150 |
96 |
66 |
36 |
|
|
200 |
456 |
288 |
200 |
128 |
88 |
48 |
|
|
Spacing Multiplier |
2.28 |
1.44 |
1.0 |
0.64 |
0.44 |
0.25 |
|
For other size areas, use the following formula to calculate how many plants you will need:
(Area in sq. feet) x (Spacing Multiplier) = Number of plants needed
(Area is 2 feet by 25 feet = 50 sq. feet) x (Spacing 12 inches apart Spacing Multiplier is 1.0 ) = 50 is the number of plants needed
Finding Unknown Spacing Multiplier
For other spacing requirements, use the following formula to figure your multiplier:
Multiplier = 144/X2 where X = the spacing distance in inches you need
Example: If you need a spacing of 13.5 inches, your multiplier would be:
|
144 |
= |
144 |
= |
0.79 |
13.52
|
182.25 |
multiple |
The above chart and formula are based on planting in a grid pattern. If you are planting in a staggered or equilateral triangular pattern (which gives a more massed effect) the rows will be a little closer together and more plants will be needed.
An additional 15% will be required and the row spacing would be reduce by a factor of 0.866 (the sine of 60 degrees) for the equilateral triangular layout.
For example - based on 100 square feet and a spacing of 12 inches, 100 plants are needed. In a trianglar pattern 15 more plants would be needed (100 x 15% = 15). Instead of 12 inch rows, rows would be 10.4 inches apart (12 x .866 = 10.392).