To make green dye in Minecraft, you will need the following materials:

• Cactus

Once you have gathered the materials, follow these steps to make green dye:

1. Find a crafting table. Crafting tables can be crafted using four wooden planks arranged in a square shape in a crafting table.
2. Open the crafting table by right-clicking on it.
3. Place the cactus in any slot of the crafting table.
4. Wait for the crafting process to finish. This will turn the cactus into green dye, which will appear in the result box to the right of the crafting table.
5. Drag the green dye into your inventory to use it.

Note that green dye can be used to color wool, sheep, terracotta, concrete, and glass. It can also be combined with other dyes to create different colors, such as lime green.