Making two of these.

Blocked the cable and ribbed hood section flat, by placing a clean damp cloth.

Sew the back of hood, pick up the neck section, sew the plackets (plain placket on left, bottonhole placket on right) Block the remaining pieces by placing damp cloth.

Rowan Cocoon: 3 buttonholes
Picked up 118st on Ribbed Hood Collar section.
Neck section: picked up 94st and 12 rows.

Buttonholes: Techknitting method Tulip buttonhole