Drive treated pickets into the ground with your sledgehammer. Place the pickets so that they form a grid with 2 feet of space between every pair. Extend the grid 10 feet from the blueberry bush in every direction. Drive each picket so that only 4 inches of the wood remains above ground.
Unroll your welded wire fencing on the ground over the grid. Lay the fencing on the ground so that it arches up as you unroll it. Bend the fencing by hand to make it lay flat on the ground.
Cut the fencing with your snips so that it fits around the blueberry bush. Cut the roll of fencing so that it makes several rows that you can lay side by side to cover the entire grid.
Hold the fencing an inch off of the ground at every point where it meets a picket. Slide a barbed wire staple around the fencing wire and against each picket. Drive the staples into the pickets with your hammer.
Bind the rows of fencing together with tie wire. Twist a piece of tie wire around both sections of fencing along each seam. Cut the ends off of the tie wire with your tin snips.