For me, I have been finding wild glowfruit trees behind the Museum, Gym, Library picnic area in Willow. My friend does not find any in her game. I have collected 78 growfruit from all the trees there.
I wonder if traits have anything to do with glowfruit trees showing up in areas after you spend enough time there? For example, I have the Geek trait, Loves outdoors trait and my first Aspiration was Gardening where I got the collector trait. My friend does not have the geek trait, but has the other two. Does this make a difference?