Use Recycled Materials
A trellis doesn't have to be expensive or fancy, just sturdy and easy to use. You can build a simple trellis out of recycled materials. To build a pea trellis, use three recycled 2x4's. The first step is to make an angle cut on the ends of two of the boards. To do this, use a circular or hand saw to cut off the square edges, leaving a point at the bottom. Position the first board at one end of the bed, placing it in the center of the bed. Place the other board 6' away and hammer it in with a sledgehammer. The board should go 2'-3' into the ground. Next hammer the other board in place. If your dirt is very hard, you can dig a 2'-3' deep hole, place the board in the hole and back-fill it with dirt to secure the board.