Popuri is defitnioly the one to marry. I am on summer year 1 and she's already on the blue heart. I married her by giving her 1 egg each day. She is pretty easy to marry considering she likes eggs, and you don't even need to look that cheat up since she lives in a chicken farm! A way to get her to like you is giving her weeds! That's right, WEEDS! AND they're free so you don't even have to spend money. Give her at least one each day.
Popuri's heart events:
Black: Time: 11:20 to 12:59 both P.M.
Day: Wedensday with sunny weather.
Location: Where you leave the blacksmith.
Purple: Day: Monday, Tuesday, Wedensday, Thursday, and
Friday. With sunny weather
Time: 6:00 A.M. to 11:59 P.M.
Location: When you leave your house in
the morning (she will ask for a tour say yes)
Blue: Day: Sunday. Time: 10:00 A.M. to 12:00 P.M. with sunny weather.
Location: At the church. * Any season EXCEPT summer. Have in empty spot in your ruck sack where you put your ITEMS not you TOOLS!
Yellow: Day: Any day except Tuesday or Saturday.
Time: 11:20 to 12:59 P.M. with sunny weather.
Location: Her farm.

*I MADE THE SAME MISTAKE YOU MIGHT BE THINKING. I THOUGHT THERE WAS HEART EVENTS FOR EVERY SINGLE HEART, BUT THERE ISN'T! ONLY BLACK, PURPLE, BLUE, AND YELLOW! NO GREEN, ORANGE, OR RED HEART EVENT!!