You can also make this on a cardboard.
Make a circle (the size of the rose)
Mark 5 points to the circle
Make a ”spider web” with sewing thread and thin needle (leave a tail on the start, finish the web by making a knot with the ”start tail and end tail”.
Cut 50cm long satin ribbon and make a knot to the end. Use bigger needle.
”Weave” the satin ribbon around the web
When the rose is ready, take the satin ribbon to the reverse side and tie it around the web-thread with a knot
see video from here: