How to Make a DIY Arched Trellis

Place two long pieces of branches about the same height side by side the width you would like the trellis to be. Allow for an extra five inches when determining the height of the trellis because the bottom section of the branches will be placed about five inches into the ground.

Put the shorter branch on top of the two branches to form the crosspiece connecting them. To place the crosspiece in the correct position, visually divide the length of the longer branches into three sections; the crosspiece should be about one-third of the way from the top of the two longer branches.

Trim the crosspiece if necessary. If it overhangs the width of the two long branches, use a marker to indicate where to cut, and trim off the excess with a small hand saw.

Hammer one small nail through one side of the crosspiece branch and through one of the longer branches. Do the same on the other side. This should create an "H" shape out of the three branches.

Bend the long branches above the crosspiece into each other to form an upside down "U" to create the arch. Weave the branches around each other all the way down to the crosspiece to establish the arch. It should hold itself in place without nails. Hammer one or two small nails through the twisted-together long branches at the top of the arch for additional strength.

Shovel two small holes about 5 inches deep (or one-fourth of the entire height of the trellis) to secure the trellis into the ground. Insert the bottom two poles of the trellis into the holes and tightly pack the earth around them using your foot.