f your tree’s trunk is over 10 cm in diameter, you may wish to use guy wires.
This involves anchoring 3 cables in the ground and fastening these cables with turnbuckles to 3 other cables (guy wires) holding the trunk in place. You can use wooden or steel stakes for the anchors. Galvanized steel is best for the guy wires. Use elastic straps or pieces of old carpet, at least 3 inches wide, to fasten the guy wires to the tree trunk. It will be easier to do so if you use grommets.