The chinese water fir is regarded as amicable to North-facing spaces in Feng Shui philosophy. The water element associated with this plant harmonizes with the North's representative element - water, fostering a nuanced balance of energies. One must however realize that Feng Shui is a personal and complex discipline, thus results may vary.

Considered auspicious in Feng Shui, pontic azalea resonates with vibrant energy. Its vibrant blooms are seen to inspire joy and positivity, ideal for harmonizing the Chi. Aligned with the East, the wood element of pontic azalea syncs naturally with the Morning Sun, setting a rhythm of growth and rejuvenation. Yet, perceptions vary immensely in Feng Shui, making this an elemental, albeit subjective viewpoint.

The swamp titi aligns harmoniously with the nurturing energy of Northwest-facing homes. Its robust vitality helps to strengthen the Metal element associated with this direction. However, as with all Feng Shui interactions, individual experiences may vary.

The white wood incense brings a harmonious and distinct balance to the home, when placed in the East, it adds yang energy, often associated with growth and new beginnings in Feng Shui. Yet, there may be variations to this traditional view due to diverse interpretations across different Feng Shui schools.

The top primrose aligns well with the South-facing direction. It is believed these plants gather positive 'chi' and strengthen the fire element associated with South. However, since Feng Shui is personal and varied, individual experiences may differ, thus adding to the beauty and mystery of this ancient practice.

Southern polypody potentially resonates with auspicious energy when placed in Western-facing sections of the home. It meshes well with the Metal energy exuded from this direction, possibly promoting vitality and growth. However, the interpretation and effects of Feng Shui can often vary, subject to individuals' perspective.

Hard fescue carries a unique energy resonating with structural solidity. In Feng Shui, it is commonly associated with characteristics of consistency and endurance, representing an anchor or a source of stability. Facing East, this plant is deemed compatible because its rigid nature corresponds with the Wood element dominating this direction, simulating the rising sun's robust health and renewal. However, remember that interpretations can be multifaceted according to individual circumstances.

The thornless crown of thorns plant, often associated with protection, demonstrates a harmonious balance when oriented towards the south. This might be owing to theories associating its thornless nature with reduced conflicts or obstructions, creating an easy flow of positive Qi. However, this is subject to various individual perspectives on the subtle art of Feng Shui.