The european mountain-ash showcases a fine sense of Feng Shui harmony when positioned in the East direction. This is rooted in the philosophy that East signifies growth and renewal, a spiritual echo of the european mountain-ash’s capacity to rejuvenate periodically. While this alignment is enthralling, it is recommended to perceive it as one of the radiant path features within the broad cosmic dialogue.

The copperleaf plants could hold significance for those seeking a balance of energies. They might harmonize particularly well when facing South, possibly due to the plant's exemplification of the fire element, which aligns with the South in Feng Shui principle. Still, remember that interpretations can vary, and choosing plants must resonate with personal energies.

The common buckthorn is seen as moderately suitable in Feng Shui. Its robust attributes can imbue spaces with a sense of stability. This plant may thrive when aligned with the North, a direction associated with water in Feng Shui. The common buckthorn's inherent resilience can metaphorically 'feed' this energy, fostering balance. However, subjective interpretation is key to any application of Feng Shui principles.

The large spur-flower is seen to have a respectable accord with Feng Shui principles. It is particularly compatible with the West-facing direction, as this represents the element of Metal in Feng Shui. Though not absolute, the belief is that large spur-flower's growth vitality potentially enhances the circulation of Chi energy in this direction. Interpretations may vary, and one's feelings and intuition take precedence.

The watch chain exhibits adequate compatibility within Feng Shui principles. It flourishes exceedingly well in the Southwest direction because this area signifies Earth element, congenial with the plant's grounding nature. However, interpretation can vary, appending it to one's unique understanding of Feng Shui harmony.

Japanese barberry can be a versatile addition to your space, harmonizing with the flow of energy. When placed in the East-facing direction, this plant may enhance family connections and support overall health, as it resonates with the Wood element, promoting growth and nourishment.

Redclaws is often associated with a harmonious energy in Feng Shui, making it a desirable addition to your garden. Its suitability for a South-facing direction is attributed to the vibrancy of its red flowers, resonating well with 'fire' element denoted by this direction. However, interpretations may vary based on individual's personal energy and other Feng Shui principles.

The bitter dock shares a reasonable affinity with Feng Shui principles, particularly when placed in North-facing settings. The plant's robust disposition echoes the element of water, associated with the North. Moreover, its capacity to adapt brings a sense of sturdiness and resilience, emulating the mysteries of the Northern direction. However, its interaction with Feng Shui can be subjective and might vary based on personal experiences and individual interpretation.