Brown-eyed susan aligns well with South-facing setups, exuding positivity and balance. As per Feng Shui, its vibrant blooms symbolize the fiery energy of the South, promoting wealth and triumph. However, remember that Feng Shui wisdom and plant preferences vary; one should consider individual surroundings and personal resonances.

The white heath aster is thought to harmonize well with a West-facing direction. According to Feng Shui, the West symbolizes Metal element, and white heath aster's white flowers echo its purity, subtly enhancing the metallic energy. This creates a calm and serene environment, although, like all Feng Shui interpretations, this may hold different meanings for different individuals.

The giant reed is symbolically harmonious for a North facing space, though its affinity may be subjective. Its robust structure and speed of growth may mirror rapid progress or strong resilience, desirable features in Feng Shui. However, careful placement is suggested due to its strong energy flow.

The silverleaf nightshade exudes a magnetic aura of mystery, which could harmonize well with a North-facing setting. Its mystical connotations may reinforce the Water element associated with the North direction, but results can vary greatly due to the individual interpreter's perspective and environment. Remember that Feng Shui is a very personal and nuanced practice.

The monterey pine subtly fosters energies of stability and endurance, harmoniously aligning with the Feng Shui philosophy. It's particularly favored when positioned Southeast, an area symbolizing wealth and prosperity, as its robust nature can metaphorically help 'grow' these attributes. However, remember that amplifying positive energy depends also on individual interaction with the space.

Southern crabgrass's compatibility with Feng Shui is subtly complex. Facing South, it can be considered a reasonable match in certain respects, primarily due to its robust vitality representing the Fire element, which aligns with the South direction. Nevertheless, the manifestation of this potential harmony must be considered in the context of a home's specific Qi flow and layout.

The green carpetweed harmonises notably well with North-facing locations. This reflects its affinity for water – a characteristic element of North in Feng Shui tradition. However, in the nuanced world of Feng Shui, personal interpretations may vary and the green carpetweed's energy could blend diversely with the surrounding chi.

The field rose signifies simplicity, purity, and reconnection with nature. This plant has a harmonious compatibility when placed in the South direction of a living space. The reason for this alignment could be attributed to the element of fire associated with the South direction - amplifying the plant's innate energy. However, the interpretation of this compatibility ultimately depends on individual perceptions and personal Feng Shui practices.