Minnesota State Forest Nursery
The following table will help you determine the number of trees needed, per acre, based upon tree spacing.
Spacing (feet) |
Tree (number) |
Spacing (feet) |
Tree (number) |
Spacing (feet) |
Tree (number) |
|
2x2 |
1,890 |
7x9 |
691 |
12x15 |
242 |
|
3x3 |
4,840 |
7x10 |
622 |
12x18 |
202 |
|
4x4 |
2,722 |
7x12 |
519 |
12x20 |
182 |
|
4x5 |
2,178 |
7x15 |
415 |
12x25 |
145 |
|
4x6 |
1,815 |
8x8 |
681 |
13x13 |
258 |
|
4x7 |
1,556 |
8x9 |
605 |
13x15 |
223 |
|
4x8 |
1,361 |
8x10 |
544 |
13x20 |
168 |
|
4x9 |
1,210 |
8x12 |
454 |
13x25 |
134 |
|
4x10 |
1,089 |
8x15 |
363 |
14x14 |
222 |
|
5x5 |
1,742 |
8x25 |
218 |
14x15 |
207 |
|
5x6 |
1,452 |
9x9 |
538 |
14x20 |
156 |
|
5x7 |
1,245 |
9x10 |
484 |
14x25 |
124 |
|
5x8 |
1,089 |
9x12 |
403 |
15x15 |
194 |
|
5x9 |
968 |
9x15 |
323 |
15x20 |
145 |
|
5x10 |
871 |
10x10 |
436 |
15x25 |
116 |
|
6x6 |
1,210 |
10x12 |
363 |
16x16 |
170 |
|
6x7 |
1,037 |
10x15 |
290 |
16x20 |
136 |
|
6x8 |
908 |
10x18 |
242 |
16x25 |
109 |
|
6x9 |
807 |
11x11 |
360 |
18x18 |
134 |
|
6x10 |
726 |
11x12 |
330 |
18x20 |
121 |
|
6x12 |
605 |
11x15 |
264 |
18x25 |
97 |
|
6x15 |
484 |
11x20 |
198 |
20x20 |
109 |
|
7x7 |
889 |
11x15 |
158 |
20x25 |
87 |
|
7x8 |
778 |
12x12 |
302 |
25x25 |
70 |
Each tree species is different in its need for sunlight, moisture, and soil type. Different trees grow at different rates. Some mature in 40 years, others take a hundred. Ask a forestry professional if you have questions about which trees to plant on a given site. Find your local forestry office.