skull13 said:
You're very welcome. I should have also mentioned that when outside, root mass depends greatly on wind and rain amounts. When there is a lot of wind or even just periodic wind gusts that cause cracking in the stem walls, or drought conditions, the plant will grow abnormally large root mass to compensate for those conditions.
If the wind is from mostly one direction, the root mass will expand on the side the wind hits to increase the support for the plant.
If there is a source of water closer to one side than another, like a creek or pond, the root mass will extend itself in that direction.
If the plant senses water at a deeper level, it will grow roots that extend deeper.
All of this increases the total volume of roots when outdoors.
Indoors, if you have a fan hitting the plants with a lot of force, it too can cause a larger root mass. The plant will grow them larger in an attempt to stabilize the plant better and prevent stem damage and tearing of the herringbone roots.