Hi Shane,
You gave me two seedlings when I were at your house 2 years ago. All of them are in full sun, and gave me couple fruits this past year. The fruits were not sweeter, very juicy, and almost favorless. There are in a 2 gal pot. I will repot them this come spring and one will put in shaded area and full sun the other one.
I have a red strawberry guava tree in the front year, over 10 years old. It give a lot fruits every year, strong favor, sweet, a lot seeds, and small fruits. Taste better than the yellow one.
Thanks,
Al