To help keep birds out of your vegetables, use bird screening. To cover most any young vegetables you need to place stakes about 3 feet apart around the perimeter of your plants. Then stretch string from corner to corner and around the perimeter attaching the string to the stakes. Place the netting over the string and pull the netting tight, and secure it to the ground. A good way to secure the netting is with sod staples. With the bird screen in place it will protect your plants.