Hi,
I'm near the area of origin of E. Itaguahiensis, some 300 km from the coast of Rio de Janeiro, where this species is native.
Mine are in full sun, without irrigation, without treatment, only weeding and fertilizing with NPK.
Produced 3 years, I do not know if they grow in the shade.
I forgot one detail, I planted the trees in the place where we had a coffee plantation for over 50 years.
A lot of organic matter, much humus, most high potassium in the soil.
When my biggest ones were smaller I had them in full sun and they didn't like it much. Put them in 75% shade and they greened up nicely. Grow so slowly