Olivia here,
The plum flowers are blooming. They have really fragrant smells. Suizenji garden’s website just posted that now it’s best time to view them.
http://www.ezuko-park.com/blog/26109
Plum blossoms are stronger than Cherry blossoms. The flowers can withstand rainy days. But viewing them during “見頃” (read: “ミゴロ“ ; Best time to view) is recommended.