Cut bias fabric strips in a width appropriate for the finished vine. Sew the bias strip wrong sides together then trim to remove the excess seam allowance. Slip a 1/4" wide metal bias bar inside the sewn bias strip, positioning the seam in the middle of the bar, and press. Move the bias bar along the length of the sewn strip, keeping the seam in the center, and pressing. Remove the bar, press again, and allow to cool.
When the vine is appliqued, it's slightly dimensional because of the seam underneath. Very pretty.