I noticed you are living in Hawaii so if I'm off the mark please forgive I've never been... but I'm assuming it's possible to regularly cut a beautiful wild flower regularly without messing with anyone's gardens.
I had a boss at a bar a while back who had me keep any leftover flowers from weddings and other events, add a vase or change the water, and put them on the main bar. His theory was that nobody would get rowdy around flowers.
I suppose you could test it by finding an old bottle or can, cut one flower, add an inch of water, and place it so you see it when you first wake up.
It's not about the flowers but grounding. Give yourself something to focus on to bring you out of your emotions and into the physical reality. Smelling lavender and oranges is calming.
If your anger isn't too quick to manifest you can even ask yourself - it's really important to speak self-actualizations out loud - why I getting angry? Why do I want to destroy my gear? for example.