Freya raised her hand carefully, "Would it be because the older, more mature plants may be a threat to the health of the less mature plants? Taking all of their sustenance so they would grow at a slower pace, possibly dying? And we'd want to keep an eye on how plants of different maturity are doing, seeing how they react to their surroundings and the care that is given to them." It was a guess, but it seemed logical enough. Freya never had much experience in plantlife.