ok. I gotcha now.
So this is how I am reading what you are saying, please let me know, how far off I am.
You have the original colony, lets all say with well rounded equal stats. The seedlings scout the asteroid, find out what kind of resources it has, and then chooses the best way to spend those resources in the three stat areas. 15 of them then reconfigure themselves into a Dyson tree that absorbs the resources and produces new seedlings to best utilize the asteroids resources. Then those seedlings navigate to a different planet, scout the resources, plant a new tree, and start production there.
I know you didn't really mention resources or anything, but I figured that would be the easiest way to explain the stats of the seedlings being generated because of the asteroid.
So is that close to what you were imagining? Because I was going down the organic route, myself... Probably because the original meaning of a dyson tree was to produce oxygen in order to support colonies... I never read the thing about mars converting water to oxygen, so I had just always assumed that they worked like regular trees work on earth, they take some element/compound in the atmosphere (presumably not co2) and use that to produce their energy releasing oxygen as a gas.