Aatrox continued walking along the way and observed an old man sitting cross-legged in meditation. Aatrox didn't feel it exactly for that reason, when he was in the other shed and thought about the possibility of having another grower, he felt nothing first because of the distance between one shed and the other and secondly because the old man was cultivating.
When someone cultivates, the person's energy merges with the environment. At higher levels of cultivation, the grower becomes literally part of the environment and only years later he wakes up. When this happened, the only way to feel the presence of the cultivator was to look at him directly, since the whole aura of the person was in perfect synchrony.
