According to 72 Seasons, it's Plants Show Their First Buds. They include a haiku:
Contract done
lower your umbrella
and gaze at the evening sky
It's from by Morikawa Kyoriku. Apparently, March 5th was traditionally the time when an employee's contract would end with his master and the employee would return to his hometown before farm work began. I think I'm probably missing something there but never mind.
For me, it's been rainy and cold. And I've got a cold. On the other hand, the sun is definitely making more of an effort. And the shape of the year is starting to emerge - schemes, ideas etc. So, for me it's Plans Show Their First Buds