With the fence.
It manufactured a box with the fence at the vestibule side.
As for the material, frame is using 2*4 material and the fence part is using the pine of 12 mm*40mm.
There is not a bottom in the box part.
The cost
2*4 material (1.8m) US$3*7=US$21
40*20mm(2m) 16sets US$ 5
Immediately, it planted herb and celery.
){kind=link}