The Feng Shui compatibility of broad buckler fern is considered substantial, on a subjective level. When orientated North, this plant is said to symbolically invite positive energy, largely attributed to its expansive fronds suggestive of growth and prosperity. However, interpretations may differ given the nuanced practice of Feng Shui.

The cat’s tail euphorbia is often regarded with fondness in Feng Shui, largely due to its distinctive upright growth. This may resemble the auspicious symbol of rising energy, being a potential enhancer of good vibes. Its compatibility with Southwest-facing direction is especially favored, theoretically linked to the Earth element that this direction represents in Feng Shui. The cat’s tail euphorbia's natural ability to thrive on rocky soil, akin to the stability of Earth, could explain this harmonious relationship. However, this is merely one interpretation--remember, the essence of Feng Shui often lies in personal perception and comfort.

The mickey mouse plant is harmoniously suited for rooms facing the South. This is attributed to the plant's vibrant yellow blooms symbolizing fire, which corresponds to South in Feng Shui elements. The placement invites energy, prosperity and is believed to manifest in a lively ambience. However, perceptions may differ across practices and personal energy readings.

The dwarf tulip harmonizes well in a south-facing direction, bearing a profound symbolism of resilience and renewal, resonating with the fiery energy of the South. However, its Feng Shui compatibility is subject to individual interpretations, depending on unique spatial arrangements.

The allegheny serviceberry embodies an exquisite harmony between Yin and Yang, fitting seamlessly into any Feng Shui design. When positioned westwards, it gently attracts the Yang energy of the setting sun, promoting prosperity and joy. Remember, positioning such plants is a deft art, where the individual's aesthetics and intuition play a grand part along with the classical Feng Shui principles.

The prairie thermopsis plant plays a contemplative role in Feng Shui. Being naturally balanced, it may suit a west-facing direction wherein Metal is the dominant element; its robust nature potentially symbolizes resilience in changing environments. Remember, interpretations vary, and your personal experience is paramount.

The betel plant tends to harmonize positively with East-facing locations. This is due to our understanding that its lively energy corresponds favorably with the energizing sunrise, a symbolism often associated with the East. The placement, nevertheless, should be fine-tuned according to the house's unique energy matrix, to fully exploit its potential harmonizing capacity.

The pitkin marsh lily can subtly enhance the Chi when placed in the East of a space. This direction, associated with health and family in Feng Shui, aligns well with the pitkin marsh lily's nature—thought to promote wellness and harmony. This information, however, should be interpreted as a general guideline, not an absolute dictate, due to the subjective interpretations within Feng Shui.