Complete stitching pattern for both sides – you will have 2 squares – big one (bottom) and small one (top).
I do not wash finished stitched items but you can do it in case f.e. it got dirty while you worked on it.
Make one row of back stitches around each square, stepping away from the pattern side 1 or 2 rows of threads (depending on your pattern visual structure).
Cut both pieces off the canvas leaving half of an inch (or less) of canvas on the sides.
Fold the biggest square on half (first, tuck the loose canvas in, folding the fabric on the back-stitched row).
I assemble biscornus using two strands, you can read more about how to fasten strands on the fabric here.
Start stitching two sides of the square leaving the middle stitch free (so if your square has 61 stitches total, you need to stitch together stitches 30 and 32, leaving the middle one – 31st – free).
Stitch it up half way, eg. if the biggest square count 61 stitches, you need to stitch together 30 stitches, leaving other 30 stitches free
Note: in my example the small square equals exactly the half of the big one, if the small square smaller or bigger, you need to leave unstitched that amount of stitches equal to the small square
Stitch up the same way all 4 sides.
Attach the smallest square to the big one, starting with connecting the corners.
Then continue attaching entire side of the small square to the jointed side of the big one.
Connect all sides the same way, leaving the last side open for stuffing.
Only stuff the base of the pincushion. Do not push stuffing into the top corners (or if you want more puffy looking tulip, stuff the corners just a little bit)
Stitch up the last side.
You can add 2 buttons or beads at the center from both sides, tightening your biscornu a little bit.
That is it!
Happy stitching! 🙂