You never make a flower bed for her but if you mean a flower wagon, then follow these steps
- On the ground outside the church, look for little orange balls that look like materia. One of them is the tools.
- In the Slum market, find the pile of wood and choose to take it. When the guy comes up, answer Seventh Heaven.
- Go up to Loveless Avenue and talk to the guy with the truck. He will give you his tires.
- Finally, go back to the Slums and find the materia balls outside the church. The Shinra Army mask has the instructions.
After you have all of those, go back to the Church and talk to Aerith.