Key moments for Arizona cactus.
| Year | Milestone |
|---|---|
| 1901 | Saguaro blossom named the territorial flower |
| 1931 | Saguaro blossom confirmed as the state flower |
| 1933 | Saguaro National Monument established |
| 1937 | Organ Pipe Cactus National Monument established |
| 1994 | Saguaro becomes a National Park |