In Feng Shui, the smooth sumac plant is believed to harmonize with South-facing directions, often associated with the element of fire. Its pointed leaves signify the fire element, promoting motivation and success. It's of importance, however, to note the subjectivity in Feng Shui practices and interpretations.

The kurrajong plant, in Feng Shui principles, holds a composed and calming energy. This could harmoniously blend with East-facing settings, typically associated with family and health. The kurrajong's growth symbolizes constant evolution in these domains. However, interpretation can greatly vary, and practitioners must consider their unique circumstances and intuitions.

Due to its rich symbolism in Feng Shui, rock soapwort aligns well with spaces that face Southwest. The plant's vibrant colors embody the earthy and fiery elements, resonating with the Yin qualities of this direction. However, the interplay of these facets may vary based on the specifics of the environment.

The small Nettle invokes a sense of strength and resilience that attracts positive chi. Its compatibility with the South facing direction can be attributed to the belief in Feng Shui that fiery energy resides in the South. Therefore, the small Nettle can serve as a symbol of courage to face life's challenges.

Narrow leaf zinnia's sturdy petals and vibrant hue emulate a lively dynamism, potentially harmonizing the Yin and Yang in an environment. Notably, South-facing setups invite the energy of fame and natural light, a match for narrow leaf zinnia's sun-loving inclination. This hints at auspicious consistency with Feng Shui principles, albeit interpretations may differ in fluidity.

The true forget-me-not is often associated with love, memories, and resilience in Feng Shui practice. It can bring uplifting energies, ideal for engaging in recalling cherished events. A north-facing placement could benefit, given the strong correlation between the North direction and the element Water. The true forget-me-not's inherent fondness for waterways subtly aligns with this. As always, individual experiences may vary, given the subjective nature of Feng Shui.

The kandyan Dancer Orchid plant is harmoniously compatible from a Feng Shui perspective. This plant channels the traditional principles of harmony and balance due to its vibrant and lively colors. When placed in the East-facing direction, it can act as a conduit for positive energy, as this direction symbolizes renewal and growth in Feng Shui, much like the kandyan Dancer Orchid's life-enhancing traits. However, remember, Feng Shui's workings are purely subjective, and interpretations can vary.

Mockernut hickory, traditionally associated with sturdy growth and resilience, might suggest subtle harmony when placed in the East direction of a space, a sector in Feng Shui tied to health and family. Remember, these associations are general and the precise energy flow depends on other variables in your environment.