The oneleaf onion possesses a unique tenderness with its solitary leaf, making it a sensible choice for those seeking balance and tranquility in their space. Its compatibility with the Southwest direction may be attributed to the element of Earth, which governs this sector, being harmonious with oneleaf onion's grounding, gentle energy.

In Feng Shui practice, the stonecrop is generally compatible with a Southwest facing direction. The plant's resilient nature and circular leaves embody an energy flow harmonious with the earth element dominant in this direction. However, personal manifestation of Feng Shui can vary greatly, thus assessment should incorporate individual environmental factors.

In Feng Shui philosophy, the reed mannagrass most harmoniously interacts with the North direction. North is correlated with the element of Water, and reed mannagrass being a water-loving plant, heightens this compatibility. Yet, the arrangement's success can vary based on individual surroundings' energy flows.

In the grand tapestry of Feng Shui, edelweiss embodies vigor and undying spirit. Its compatibility with the Northwest-facing direction is notable. This preference stems from the emblematic resilience of edelweiss in harsh conditions, akin to the tough, yielding metal elements associated with the Northwest direction. Yet remember, such arrangements may resonate differently to individual life force energies.

The bog laurel boasts vast Feng Shui compatibility. It is seen as promoting tranquility and inner peace. Ideally located in the Northeast direction, it is believed to be harnessing Earth energy, nurturing wisdom and personal growth. This is due to the Northeast's association with the 'knowledge and education' bagua area.

The japanese false bindweed plant harmonizes well in a Southwest-facing area. This auspicious positioning is based on the Five Elements Theory—wood, earth, metal, water, and fire. The japanese false bindweed represents the wood element which is believed to be nourished by the earth element associated with Southwest, promoting balance and prosperity. This, however, can vary based on personal and temporal contexts, hence the importance of personal experience and judgment.

The japanese thuja lends a sense of tranquility and peace to its surroundings, aligning well with harmonious energy flow in Feng Shui. When placed in the South direction, it can symbolizes strong growth and vitality, as South usually represents the element of fire in Feng Shui, encouraging life and fostering prosperity.

The smooth rose possesses an intriguing compatibility with the Northeast direction according to Feng Shui principles. Its gentle, unfolding energy is seen as synergistic with the Earth element in this quadrant, lending a harmonious calm to the environment. Note, this might not resonate with everyone, as Feng Shui interpretation is immensely personal.