The silver star plant harmonizes well with the Southwest-facing direction, a significant point in Feng Shui. The plant's silver hue mirrors the earthly and feminine energies tied to this area, potentially attracting positivity and tranquility. However, one's experience with Feng Shui is personal and subjective, and outcomes may vary.

The purple three-awn cultivates a robust energy flow, reinforcing prosperity and positivity in the house. Its compatibility with the South-facing direction as the Feng Shui fire element zone could potentially enhance fame and recognition. However, remember that Feng Shui interpretations may vary, taking into account personal energy and house layout.

Hardy rubber tree embodies earth-like qualities, promoting stability and nurturing energy. This makes hardy rubber tree favorably compatible with a Northwest-facing direction, as the Northwest is symbolically tied to the element of Earth in Feng Shui. However, the blend of energies is variable, subtly influencing the life aspects of those in the space.

Canton fairy bells evoke a sense of tranquility and balance, harmonizing with the natural path of life energy or 'chi'. It exhibits an amiable Feng Shui compatibility when positioned facing North; water element of this direction aligns with the plant's nourishing energies. However, interpretations vary and should be personalized to one's individual energy.

The spring spiderlily embodies delicate vibrancy which harmonizes well with the robust energy of the Northwest direction. It's believed that its lush and radiant bulbs can draw luck of personal development and spiritual growth. Yet, Feng Shui, a subject of infinite perspectives, can be interpreted with personal nuances.

The large-flowered bellwort plant, with its vibrant blooms and pendulous leaves, possesses a life-sustaining energy that resonates well with Eastern directions. This promotes growth and renewal—an ideal match considering East signifies the birth of a new day in Feng Shui philosophy. However, please be mindful that Feng Shui interpretations vary, and this analysis might not resonate with all.

The prickly rose embodies harmony and resilience, seamlessly tying into the Feng Shui notion of energy balance. Favorably positioned towards the South, this direction symbolizes fame and reputation in Feng Shui. The robust nature of prickly rose can reinforce this energy, providing a subtle but deeply rooted support for personal enhancement. However, interpretations of Feng Shui can be varied, thus, this pairing should be considered alongside other aspects of your environment for an optimal blend of energies.

Plumleaf crab apple is generally perceived to have a harmonious relationship with the East-facing direction. This stems from an underlying belief in Feng Shui that associates the East with growth and renewal, reflecting this plant's resilience and constant rejuvenation. However, one's personal Qi and environment play a significant role in this perceived auspiciousness.