The common buttonbush plant is considered most harmonious when placed in the West-facing area of a room. This is largely due to its round blossoms, which symbolize the metal element in Feng Shui, dominating in the West direction. However, take note that as every space has its own unique energy dynamics, these guidelines may not apply perfectly in every situation.

The new caledonia pine shows unique compatibility when facing East. This direction brings out its inherent wood-energies, stimulating growth and harmony. Yet, its Feng Shui alignment may oscillate due to various external factors, offering a scope of spiritual fluidity.

The giant horsetail is thought to enhance the energy of the North sector due to its tall, towering structure which can amplify the powers of career and wisdom. However, as Feng Shui is a personalized practice, individual results may vary.

With its dominant yet serene presence, queensland lacebark might harmonize well in an East-facing area. The East, associated with Family and Health in Feng Shui Bagua theory, resonates with this plant's hardy character. However, always remember that Feng Shui recommendations are nuanced, and individual circumstances could influence this compatibility.

The clustered bellflower aligns fairly well with Feng Shui principles, exhibiting an ambiguous harmony with the environment. It communes exceptionally with a Westward facing direction due to the setting sun's reflection on its vibrant bell blooms, subtly enhancing Chi energy flow. Remember, Feng Shui is experiential, and individual results may vary.

The scarlet pimpernel is an intriguing addition to Southeast facing areas in Feng Shui practice, thanks to its vibrant scarlet color. This direction, correlated with the Wood element, is believed to be invigorated by the fiery red hue, symbolizing ignition of growth and personal developments. However, as different systems can interpret the same principles differently, it's essential to tailor Feng Shui applications to individual preferences and context.

Corn speedwell may imbue a sense of balance when positioned in a Southwest facing direction. The gentle vibe of this plant subtly influences personal growth and development as per Feng Shui practice. Remember, the effectiveness of Feng Shui is highly subjective and dependent on personal experiences.

The wild tulip holds a soft affinity with the South-facing sector, known for being governed by the element Fire in Feng Shui. The wild tulip's vibrant yellow flowers are reminiscent of a warm, fiery energy, subtly boosting enthusiasm and inspiring forward progress. Thus, this could enhance the liveliness of any South-facing area. However, the interpretation of Feng Shui is deeply personal and this general compatibility must be adjusted according to individual surroundings and requirements.