For nepali hog-plum, it aligns well with the Feng Shui principles of tranquility and harmony. Particularly suitable for homes with East-facing doorways, nepali hog-plum is believed to summon refreshing energy, owing to its lush, rejuvenating foliage. The assertion, however, remains open to personal interpretation and subjective Feng Shui perspectives.

The lantern flower shows an intriguing compatibility with Feng Shui principles. It particularly harmonizes with the Southwest direction. This is presumably due to its innate characteristics that resonate with the Earth element, predominately associated with the Southwest, fostering grounding energy and stability. Subjectivity remains a key factor in Feng Shui, requiring personal interpretation.

Chinese mahogany aligns harmoniously with the East-facing direction. This is mainly due to the plant's oriental origins, symbolizing renewal and growth in Feng Shui philosophy, which resonates well with the East's inherent energy. This understanding, however, can be subjective and varies among practitioners.

Winterfat is generally seen as a symbol of resilience and endurance. When placed in a Southwest-facing location, winterfat is believed to amplify these traits, embodying stability and instilling a sense of calmness. Nevertheless, one's personal experience might vary and intuition should thus play a key role in winterfat's positioning.

Straw foxglove exemplifies steady growth and vitality, making it an intriguing choice for Feng Shui enthusiasts. Its sunny hues mirror Earth energies, fostering stability and grounding. When situated to face the Northeast, it could possibly amplify spiritual insight and personal growth due to this direction's association with spiritual enlightenment and self-cultivation in traditional Feng Shui philosophy. Remember, harmony in placement is deeply personal and should mirror one's own intuitive sense of balance.

The erect prickly pear holds symbolic potential in Feng Shui, particularly in promoting both protective and healing energies. Its compatibility with the Northeast direction might be due to this area being linked to personal growth and self-cultivation in Feng Shui, harmonising well with the plant's resilience.

The deer fern plant slightly veers towards the mellow aspects of Feng Shui. Its perfectly balanced shape signifies equilibrium, invariably harmonizing energy within a space. Positioned towards the Southwest, it taps into Earth energy, drawing stability and nourishment into your surroundings, a typical Feng Shui notion tying Earth elements to this direction. As ever, individual experiences may fluctuate due to the esoteric nature of Feng Shui.

The scaly male fern is deemed highly suitable in Feng Shui practices, especially when placed in the South. Its robust form represents unyielding strength, mirroring the flaming energy of the South, the domain of the Fire element. However, as an art of balance, Feng Shui is vexingly elusive, and the suitability of the scaly male fern can vary according to personal circumstances.