Cut about a 1.5 inch to 2-inch slit in the bottom center edge of the petal. Add a touch of glue on one edge and slightly overlap the two pieces.
Use your dowel or marker to roll the one side inwards, and the opposite side backward.
With your dowel, this time curl BOTH sides inward, towards you. Do this for all the medium, small, and extra small petals as seen above.
With your 8-sided base begin placing your extra-large petals, one petal for each side of the base.