Willow branches are used for weaving baskets on a loom. They can be obtained by using secateurs on a willow that has fully grown in a tree patch, using the Farming skill. Branches will begin growing after you check the health of the willow tree. The tree will produce one willow branch every 5 minutes, up to a maximum of 6 at a time. This means that if you wait for more than 30 minutes, you will only be able to cut 6 before having to wait 5 minutes to cut another.
An Introduction to Forestry (Peepo x OSRS team Collab) : r/2007scape
Tree - OSRS Wiki
Willow tree - OSRS Wiki
Oak tree - OSRS Wiki
WILDSWANS】BRANCH(フルグレインブライドル、ロンドンカラー
Branch - OSRS Wiki
WILDSWANS】BRANCH(フルグレインブライドル、ロンドンカラー
Basket - OSRS Wiki
Pear tree - OSRS Wiki
I've had these Willow logs in my GE for like 2 years It's finally paying off. : r/2007scape
WILDSWANS】BRANCH(フルグレインブライドル、ロンドンカラー