I'm looking for an answer to how many seedlings will grow on an asteroid untended (without moving any out or in). It seems to be (10*# trees), though I don't know if that is the maximum trees or the planted trees. Also, I seemed to notice that as they were approaching that maximum the growth rate slowed noticeably. Getting to 25 on a 4 tree rock was stead, but from 35->40 seems to be a very slow process.