Flowers in season

I've been walking along the Tsurumi River these days.
What kind of flowers in season are there now?
Cherry blossom? No way, new items are comming for April. I think it's an azalea.

And I often find these two bulletin boards.
Danger! Pedestrians(walkers) are prior to cyclists! Be careful of rushing out.
Danger! Cyclists, you must keep speed safe enough to stop anytime!
I'm aware of many reckless cyclists.
No disrespect intended, there are many cyclist accidents caused by cyclists, like Uber Eats delivery man.