Swayed by the comments:

Once again, I started with a sleeve cuff, knitting until it fit firmly around my head. Then I picked up two stitches for every three around the inner edge. I calculated from my swatch how many stitches I ought to have around it for a firm fit and decreased to that amount. Knit a few rows, add the bobbles as they are in the coat pattern, knit a bit more, and decrease at 1/6th intervals every second row to the crown. Then it was just a matter of knitting the smaller leaves from the coat pattern and sewing them down (one over the ‘cuff’ join to hide it).

I am officially tired of knitting leaves.