Make a half batch of frosting; divide into 3 portions. Tint 1 green, 1 orange and 1 yellow. Spoon into 3 pastry bags; fit with couplers.
Vine. With toothpick,outline vine on side of cake.Use #3 writing tip to fill invine with green frosting.
Flowers. Pipe 12 orange flowers along vine with #16 star tip, using a squeeze-and-release motion.
Leaves. Make leaves using #352 tip. With yellow frosting and #3 writing tip, pipe centers of flowers.