Willow Trees may chopped using the Woodcutting skill awarding the player Woodcutting XP, or be grown via Farming from Willow Tree Seeds
awarding the player Farming XP. After both harvesting options player also receives Willow Logs 
.
Willow Logs are especially useful for Crafting as well as Cooking, which give +3 heat when burned. This may be increased to +4 with the easy Woodcutting achievement perk.