It's strange, because the rootsystem of mine is indeed deeper than jaboticaba. Wilma caused my grumichama to lean at 15 degree angle. I later tried to return it to perpendicular with the ground by using my car to pull, but it was an exercise in futility, as the darn thing would not budge. My jaboticaba however, toppled with ease.
In my experience, the jabo is shallower rooted than the cherry rio grande, which is shallower rooted than the grumichama.
I stopped 'hat racking' my grumichama, as that just caused it to shoot right back up in the air. Now, I've been using a different pruning technique where I cut out branches from the bottom. I'll see if I can find a picture of what I'm talking about.
Ok, I couldn't find a picture online, so I'll take this opportunity to show off my exceptional MS Paint skills:
The hat rack style prune make my grumichama grow really fast. The selective full branch prune seems to slow down the re-growth.
I hate pruning the darn thing because my chipper shredder can barely cut through the wood.
My experience with grumichamas is different from others.I consider them a moderately deep rooted specied with moderate drought resistance.They certainly are deeper rooted at my place than jaboticabas,mangosteen or limes and less prone to toppling over in high winds than the species I mentioned.I would hate to try and dig my yellow one up.
They do enjoy a good haircut and grow back profusely.I reckon they should be pruned with an iron fist.