There are plenty of ways to make garden art flowers from metal including soda can tins. These creations from Etsy should give you plenty of ideas.
Also see, How to make glass garden art flowers from dishes.
Tin Daffodils Bouquet | TinFishStudio
Vintage tin flower art | ElizabethRosenArt
Red daisy metal flowers | FlowerPowerShowers
MORE: See all my Etsy-inspired ideas here
Chrysanthemum garden stake flowers| GardenDreamsDecor
Raw Metal Flower | hiSIS
Yellow metal flower|FlowerPowerShowers
Metal flower wall art | SalvageandBloom
Red Flower Garden Stake | ChicFabulousFlowers