The tree mallow subtly harmonizes with West-facing locations due to the resilient nature of the plant, said to mimic the undulating energy of Metal, which governs this direction. However, as feng shui is a nuanced art, individual results may vary.

The arthraxon sp. 'Malaysia' plant embodies a soothing energy, harmonizing well with the earthy influences of the Northwest direction. Its green foliage symbolizes growth and peace, beneficial for fostering steady vitality and serenity in this quadrant. However, due to the subjective nature of Feng Shui, individual experiences may vary.

The twistleaf yucca plant is considered favorable in Feng Shui to balance energies, bringing a subtle and grounding aura to a space. Orienting this plant towards the Northeast is recommended. It’s believed that its long-lasting and sturdy leaves synergize well with the Earth element common to this direction, enabling stability and tranquility. Remember, true harmony isn't one-size-fits-all; it depends on a myriad of factors, with plants being just one aspect to consider.

The mountain pride displays fair compatibility with South-facing settings. In Feng Shui lore, South is associated with the element of Fire. Since mountain pride sports fiery red blossoms, it could metaphorically foster this elemental energy. However, nuance is substantial in Feng Shui and individual interpretations may differ.

Davidson's penstemon enhances energy flow, especially when placed in the North. Its vibrant hues help to stimulate career growth, influenced by the water element associated with North. However, Feng Shui interpretations vary, making this arrangement a mere suggestion, not a rigid rule.

Western white pine may harmonize well with East-facing spaces. In Feng Shui, East is tethered to the wood element, and western white pine, being a species of pine, has a strong wood energy. Remember, however, outcomes in Feng Shui vary and are inherently personal.

The pellionia radicans plant, with its vibrant, trailing foliage, is viewed as a subtle enhancer of Feng Shui. Its potential to attract positive chi when positioned in the West-facing section of a home or office is strong, primarily because in Feng Shui practice, West is associated with the element of metal, and the green hue of the pellionia radicans can symbolize the element of wood, which nourishes metal in the productive cycle. However, interpretations may vary.

The marsh helleborine is conjecturally harmonious when placed in a Northwest-facing direction. This stems from its purported grounding qualities which resonate well with the earth element associated with Northwest. However, intricate interpretations based on one's unique energy profile may result in contrasting conclusions.