To get it while play as a male:
Once a marriage candidate has an Orange Heart Color the Blue Feather will become available at Jeff's store.
To get it while playing as a female:
See all of the Heart Events with a marriage candidate. In the final event he will ask your character to marry him. If you say yes he'll come back one week later and give your character a Blue Feather.
Once you have the blue feather you can purpose to a Girl.
well to get the blue feather one girl of your choice has to like you at the MAXIMUM level then you can buy the blue feather from the supermarket (for harvest moon ds)
One week after you give your girl the blue feather. You get the blue feather after taking a girl to orange heart level.
When the Harvest Sprites give you the blue feather it means that they have realised you have four red hearts. You then give it to that girl and you get married on Spring 1 the next year.
well to get the blue feather one girl of your choice has to like you at the MAXIMUM level then you can buy the blue feather from the supermarket (for harvest moon ds)
You can get the Blue feather from Jeff's General Store. The Blue feather will cost 1000 G.
when:girl with 4 to 5 red hearts
You can Purchase a Blue Feather from Karens Shop once you have a LP total with one girl/boy of atleast 50,000 (Orange Heart)
The Blue Feather costs 1,000G.
i think its 1000
you propose with the blue feather that you can buy in the shop
you must have 60 harvest sprites, have a have a girl at a red heart color and get a blue feather at the supermarket for 1000 (don't drop it)