The cast-iron plant displays admirable resilience, mirroring the Metal Element in Feng Shui, which signifies strength and determination. As such, it harmonizes well in Northwest-facing locations. Its steadfastness can encourage stability and balance, although interpretation varies based on individual insights. This compatibility analysis values broadly accepted Feng Shui principles.

The java plum manifests a unique compatibility with the East direction, often attributed to its robust energy, mirroring the sunrise's vitality. Note, however, that Feng Shui interpretations can vary and your personal connection with the plant also plays a significant part.

The curly dock plant carries a unique energy that finely resonates with the Earth element, prevalent in the Southwest direction in Feng Shui. Its upward movement facilitates a gentle, yet powerful, uplift of energies. Please remember, plant usage and effectiveness in Feng Shui can vary with individual interpretation.

Rose geranium is considered to be auspicious when placed in a South-facing direction due to the plant's vibrant colors and robust energy flow. This harmonizes well with the fiery element traditionally associated with the South, enhancing prosperity and positive energy in the surroundings.

Multiflora rose aligns harmoniously with the Southwest-facing sector. This posture fosters optimal energy flow, often linked with love and relationships in Feng Shui practice. However, interpretations may vary and individual experiences should inform this subjective balance.

The succulent string of pearls is perceived to harbor expansive energy, making it congruous in West-facing spaces, often associated with creativity and joy. The plant's round leaves fittingly symbolize metal, a dominant element in the West, potentially fostering equilibrium. However, reactions to Feng Shui are individual, thus, observations may differ.

The yellow daylily aligns harmoniously with the Southwest direction. In Feng Shui, this is often associated with the energy of love and relationships, harmoniously delivering a sense of stability and peace. The plant's vibrant yellow color stimulates positive energy flow and cheerfulness, further enhancing its compatibility. However, interpretation varies and is highly individual, so one's personal connection to the plant is crucial.

Common fig proves to be a favorable choice in Feng Shui, due to its potential to boost wealth and prosperity. When placed in the East-facing direction, it may foster harmonious family relationships and support good health, as the East is closely associated with such positive elements in Feng Shui practice.