The black tea-tree exudes potent grounding energy, an essential attribute in Feng Shui. When positioned in the southern direction, it encourages growth and progress, echoing the southern attributes of fire and advancement. However, interpretation of Feng Shui principles can be subjective and it's essential to feel a sense of harmony when positioning your black tea-tree.

The winged sumac is widely considered compatible with a Southern facing direction. The plant's resilience mimics the unyielding strength of the South, symbolizing enduring prosperity and vitality. It’s important to note, however, that Feng Shui is subjective and these interpretations can vary.

The chinese witch hazel possesses a balancing aura that harmonises with the North direction's water element. Its winter flowering habit symbolizes perseverance, aligning well with North's resilience, making it a suitable choice. However, as with all Feng Shui considerations, placement should be tailored to personal intuitions and comfort.

The switchgrass presents an impressive manifestation of tranquility and balance, making it a harmonious addition to any Feng Shui-focused space. When this plant faces West, it invites vibrant energy and fosters prosperity. This alignment might be due to its inherent ruggedness and steadfast growth patterns, which, in Feng Shui, symbolize resilience and stability, characteristics that are auspicious when channeling the powerful West-facing forces.

The red spruce embodies strong qualities of stability and endurance, aligning well with the Earth element in Feng Shui. Placing it in the Northeast could enhance personal growth and learning opportunities, as the Earth element dominates this sector. However, the impact varies with personal Qi and intentions.

The toad lily might have a subtle influence in one's Feng Shui when placed in a North-facing direction. This illuminated location aligns with the Water element of Northern Feng Shui, which could potentially be balanced by the toad lily's naturally vibrant yet calming hues. As Feng Shui tends to be highly subjective, personal experiences may vary.

The christmas cactus demonstrates harmonious compatibility in the context of Feng Shui, particularly when facing East. The plant's natural rejuvenation towards the rising sun can be decoded as an absorber of potent, positive Chi. Nevertheless, this interpretation holds good as per subjectivity inherent to Feng Shui. It is suggested to observe personal harmony after placement.

The longspur violet is generally harmonious in a North-facing environment. The delicate purple hue of its blossoms draws on the water element, traditionally associated with the North. However, as Feng Shui is subjective, this should be interpreted according to personal resonance and space dynamics.