I strongly suspect that lighting amounts for a lot of the difference in growth rates people have been experiencing. I notice a strong difference in the size of my Luc's (4 year olds) in my grow room depending on where they've spent their lives. And they're all quite small, which would be expected given the low light conditions relative to direct sun (really should have about 4x the grow lights, but I can't afford that kind of power bill
). The one that's been in the worst location still looks like a seedling; the one in the best area is maybe 40cm tall.
Basically, they'll survive shade, but they won't thrive.
