The hummingbird bush exhibits convincing compatibility with Feng Shui principles. Appreciated for its vibrant flowers, it is said to attract positive chi when facing South. The rationale is emboldened by the traditional understanding that South represents the element of fire, matching the hummingbird bush's fiery-red bloom. However, one's personal alignment with Feng Shui is deeply subjective and multifaceted, the placement of hummingbird bush may yield different results for different individuals.

The bredia sinensis plant fosters auspicious energy when placed in East-facing direction. As per Feng Shui, this direction is related to family and health—both attributes that bredia sinensis is believed to enhance, thereby heightening its compatibility with East. The harmony or contradiction of this belief may vary based on individual Feng Shui interpretations and practices.

The african sage exhibits a considerable level of compatibility with southern facing areas. Among Feng Shui adepts, it's considered this plant's robust vitality and lively hues align favorably with the Fire element associated with this direction, injecting a powerful energy balancer to the setting, albeit the actual effect may vary upon individual perception due to Feng Shui's highly subjective nature.

With an energy exuding serenity, the bulley's primrose harmonizes well with East-facing structures. The plant's upward growth reflects the Wood element associated with East in Feng Shui, allowing it to naturally tap into the stimulating and revitalizing energies of the morning sun. However, this pairing might be interpreted differently considering the diverse complexities of Feng Shui.

The pride of India carries a welcoming energy, signifying honor and beauty, harmonizing well with the vibrancy of Feng Shui principles. When placed in the Southeast, it is believed to elevate wealth and prosperity's chi, attributed to the plant's lush blooms symbolizing abundance. However, like all elements in Feng Shui, the effect can vary greatly from individual to individual.

The agapetes lacei plant, with its evergreen nature and vibrant flowers, exhibits compatibility with the Western direction, often associated with elements of creativity and future prospects. The plant's propensity to exude a sense of calm and positivity potentially enhances the chi flow in this direction. However, Feng Shui principles remain subjective and can vary depending on one's perception and unique life factors.

The stonecrop aligns well with Western facing window areas, attributed to its flourishing under soft afternoon light. This resonates with the Feng Shui principle of accumulation. However, as Feng Shui interpretations vary, this might not always be wholly accurate. Always remember to harmonize this with personal energy levels for the best results.

The grass-leaved iris is generally considered harmonious in Eastern-facing spaces. This orientation represents the Wood element in Feng Shui, which bodes well with the plant's natural attributes. However, remember, Feng Shui guidelines should be adapted according to personal preference and unique environmental conditions for optimal energy flow.