Cherry blossom is three weeks of it. Flip through the other forty-nine — and watch what's in bloom move up and down the country.
The calendar is the way in. Underneath it sits the ordinary thing — search, filter by month or flower, and open any of the 412 spots.

Photo xe zna (CC BY-SA 3.0) — via Wikimedia Commons
A country station on the Watarase Keikoku Railway in the mountains of Gunma, with a hot-spring bath in the station building and red spider lilies beside the tracks in autumn.