The rare Crystal Seeds in Rune Factory 4

As with the Tree to the west of Obsidian Mansion that delivers Fruit Tree Seeds daily, there is a Tree to the East of Sercerezo Hill that delivers the rare Crystal Seeds on a daily basis.  The colour of Crystal Seeds that you will obtain depends on the Season.  In the Spring, you can find Blue Crystal Seeds.  IN the Summer, you will find Green Crystal Seeds.  In Autumn, Red Crystal Seeds will be obtained and in Winter, you will find White Crystal Seeds.  Take the airship to the point that is named Sercerezo Hill and then go south one screen before walking east to the lower bridge that crosses the gap.  Go east one screen, south one screen, then west through the hidden gap in the pink Sakura Trees to find the screen with the magical Tree.  It is on a screen that overlooks the abyss.