Place the green candy melts in a microwave safe bowl and heat them in the microwave according to the package instructions. Transfer the melted candy to your piping bag and cut the tip off the bag.
Using the pipping bag, drizzle the candy over the top of the pretzel stick in a zig zag pattern, making the lines slightly larger as you move down the pretzel to create a triangle shape.
Decorate the trees with the Christmas sprinkles immediately before they harden. You may have to gently press then sprinkles into the trees to adhere them. Then allow them to set for a few hours to completely harden before picking them up.