Okay, so I googled it. And I was not wrong!

"'When we're stressed we release something called cortisol this is the stress hormone but actually engaging with flowers, smelling flowers and being mindful with flowers can actually reduce the levels of cortisol and Help you feel more relaxed.'

Flowers are known to stimulate several chemicals like dopamine, oxytocin and serotonin in our brains. These are the ‘happy’ chemicals. And whenever we see or receive some pretty flowers our brain instantly recognises that as a good, rewarding thing. Basically, it’s almost impossible to feel sad when looking at some beautiful bouquets!"

https://www.bloomandwild.com/flowers-affect-the-brain

#0: The color combination of that bouquet is incredible!