The tulip prickly pear is broadly harmonious with Feng Shui practices. Positioned in the West, it can channel positive energy since West is known for Metal Element, and prickly pears symbolize resilience--a characteristic linked to Metal. However, its full compatibility may depend on individual circumstances and personal Chi.

The pale pink-sorrel fits harmoniously with East-facing areas according to Feng Shui principles. Known for representing growth and vibrancy, the East is maximized by this plant's subtle vitality. However, the subjective nature of Feng Shui should always be respected; while some may find this compatibility beneficial, others may have different experiences.

Yellow waxbells syncs well with the North-facing areas, often associated with water element in Feng Shui which compliments its moisture-loving nature. The lush foliage radiates tranquility. However, personal experiences may differ as Feng Shui is profoundly personal and subjective.

As per Feng Shui principles, the royal mahogany plant is believed to harbor strong positive energy. Specifically, when placed in the East, it brings about resilience and longevity to the dwellers, supposedly because the East symbolizes family, health, and spring, which aligns well the energy brought by royal mahogany. However, individual experiences might differ, implying the subjective manifestation of its energy.

The persian fritillary harmonizes well with Southwest-facing premises, resonating with the Earth element represented by this direction. It's believed that the plant's delicate and intricate blossoms can soil-balance and radiate sutble earthy energies enhancing cooperation and stability. Remember, interpretations can vary as Feng Shui is an art of balancing and harmonizing energies, subjective to individual spaces and perceptions.

The silver star plant harmonizes well with the Southwest-facing direction, a significant point in Feng Shui. The plant's silver hue mirrors the earthly and feminine energies tied to this area, potentially attracting positivity and tranquility. However, one's experience with Feng Shui is personal and subjective, and outcomes may vary.

The chinese firethorn resonates well with the forces in a Southwest-facing direction. This orientation, governed by Earth in the Feng Shui compass, aligns with the chinese firethorn's symbolism of protective energy and robust growth. However, the final positioning should reflect individual circumstances, to harmonize personal energy with environmental nuances.

The purple three-awn cultivates a robust energy flow, reinforcing prosperity and positivity in the house. Its compatibility with the South-facing direction as the Feng Shui fire element zone could potentially enhance fame and recognition. However, remember that Feng Shui interpretations may vary, taking into account personal energy and house layout.