Place the rod in the ground next to the tree. If a root or something else prevents sinking, find another spot.
Sink the rod about 4 inches (10 cm) below the surface of the soil.
A normal tree needs a stick. Trees with a diameter of more than 1m need two rods. A tree with 2m diameter needs 3 sticks. Arrange them at the same distance around the tree. The bars remain in the ground forever. The BIO energetic effect never loses its impact ! The regeneration phase lasts about a year.