Ground growing is great for building a trunk, but not much else, and both existing roots and branches will almost always grow out of proportion with the trunk if left unchecked. If I enter this particular contest, it will be because I've found a native tree that already has a decent trunk with some size and movement down low- added trunk taper and a decent root spread would be ideal- and collect to build both the rootage and the canopy in a pot. That's my plan

.