Sap is readily available from several sources: Chopping Trees: Every time you chop down a tree with your Axe, you'll receive Sap. The amount can vary slightly. Breaking Branches: Small branches scattered around your farm and in the wilderness can be broken with your Axe or Pickaxe, yielding Sap.

Sap has a few key uses: Smelting into Coal: This is the most significant use of Sap. By placing Sap into a Furnace, you can convert it into Coal. This is a vital process for ensuring a consistent supply of Coal, especially in the early game when mining might be limited.

Sap — Stardew Valley Guide

Redirecting to Sap — Stardew Valley Guide