Select the sturdiest latillas to serve as cross members. Lay out your fence by driving a stake in the ground where you want it to start and one where you want it to end. Wrap a string around one stake and run it to the other stake to establish a guide for the fence.
Dig a 2-foot hole every 7 feet with the posthole digger. Use the string as a guideline to keep the fence straight by digging the holes right next to the strong all along the fence line.
Put the 6-inch-diameter, 10-foot-high tree trunks in the holes and backfill around the tree trunks with the dirt you excavated from the holes. Hold each post upright while you fill around it with dirt. Step on the dirt you backfilled the hole with, firming it around the post. The 10-foot-high tree trunks will serve as the support posts for the fence.
Nail two latillas between the two posts to create horizontal crossbars. Position one latilla crossbar 1 foot off the ground and another 1 foot from the top.
Pull up your stakes and string when you are done building the fence.
Line up the latillas along the crossbars forming the body of the fence. Allow the latilla to rest against the dirt. A latilla fence is similar to a stockade fence, with vertical trees forming the main body of the fence. However, stockade fences are made from larger, more uniform trunks than a latilla fence.
Predrill holes in each latilla where you will insert the nails to secure the latilla to the crossbars. Predrilling holes for the nails prevents the latilla from splitting when you pound the nail through the latilla into the crossbar. Nail the latilla to the top and bottom crossbar using 3-inch galvanized nails.