The flower in the "Mountian Pass" is a special reward, not a regular craft task. In each adventure of the "Mountian pass" series you can collect the special item that is required to create this reward.
To play adventures from the "Mountian pass" series open "Adventure" menu. At the top there is a special list of series of adventures.
Play all related adventures with great attention, as elements of the special reward are well hidden in each adventure.