When observing the feng shui principles, bottle gentian is generally regarded as compatible. The plant's robustness and dark-blue flowers can introduce a sense of tranquility that aligns well with the yin energy. As for the north-facing direction, it relates to the element of water in Feng Shui, which matches with bottle gentian's water-loving nature, potentially enhancing energy flow and prosperity in a space. This is subject to interpretations as Feng Shui integrates one's intuition and personal taste for achieving harmony.