Arguably, poached egg plant carries a fine vibe of youthful vitality and joy, aligning auspiciously with North-facing areas in Feng Shui. This direction resonates with the water element, typically signifying life's flow and growth. Therefore, poached egg plant, with its lively and vibrant components, may harmoniously boost this energy momentum in such an environment. However, the Feng Shui compatibility of the plant is subjective, and interpretations can differ across practitioners.

The fishhook barrel cactus is regarded warmly in Feng Shui due to its resilience and longevity. Placing it in a west-facing direction is considered auspicious because the plant symbolizes the manifestation of perseverance and willpower. The setting sun in the west metaphorically underscores the plant's enduring qualities. However interpretation varies, inviting inquiries to delve deeper into personal Feng Shui exploration.

The siberian larkspur is associated with a sense of spiritual growth within the Feng Shui practice, rendering it an interesting choice for enthusiasts. It fits well in a North-facing direction, thought to symbolize the water element. Siberian larkspur's vibrant blue flowers, mimicking water’s hues, subtly resonate with these energies. However, as always in Feng Shui, personal resonance with the plant and space should be your guiding principle.

The pepper tree harmonizes well with the east-facing areas due to its vibrant foliage and natural resilience. These qualities energetically align with the Eastern principle of health and family in Feng Shui. However, actual results may vary depending on the surrounding elements and individual perceptions.

Giant wildrye undoubtedly brings a balance to any space it is placed in due to its enduring and resilient nature. It meshes most harmoniously with the East-facing direction, traditionally considered in Feng Shui to signify health and longevity which aligns well with the hardy traits of the plant. However, the impact of giant wildrye is subjective, varying depending on one's perception and interaction with it.

The iron Cross Begonia has a complex and intriguing presence, making it an interesting addition to spaces with Eastern orientation. Its unique markings are believed to symbolize depth and transformation, qualities often associated with the Wood Element in Feng Shui, a key Essence typically linked to East-facing environments. Please, keep in mind that the interpretation is largely subjective, and other variables might impact the placement.

The blue haze plant, picturesque with a blueish tinge, lends itself beautifully to north-facing areas. North being a domain of water in Feng Shui theory, blue haze's blue hues signify water, aligning harmoniously with this direction. However, interpretations may differ reflecting Feng Shui's nuanced and subjective nature.

The rattlesnake orchid responds harmoniously to the Eastern direction, where rising sun energy stimulates its growth, mirroring Feng Shui's principle of life and vitality. However, the unique energy of rattlesnake orchid may not align harmoniously with every space—interpretation and adjustments are always required.