The citron day-lily presents a harmonious compatibility with the southern-facing setup due to its association with the element of wood, a naturally invigorating force for the fire element of the South. However, the balance of Feng Shui is notably intricate and individual, hence this suggestion may not be universally accurate.

The shamrock is said to possess a subtle yet profound energy balance in Feng Shui. Being an emblem of luck, it's purportedly harmonious with an East-facing direction, as East symbolizes growth and new beginnings - traits well aligned with the shamrock's resilient character. Yet, remember, Feng Shui is a personal journey full of intricacies that vary among individuals.

The washington hawthorn aligns well with Eastern-facing properties, a direction traditionally associated with family health and growth in Feng Shui practice. The robust nature of washington hawthorn is considered to harmonize with these attributes, potentially aiding in fostering strong familial bonds and wellbeing. However, personal experiences may vary due to the unique energy and characteristics of each space.

The rock tobacco is relatively adaptable to diverse settings, mirroring the flexible spirit of Feng Shui. Its compatibility with the southwest direction is particularly noted. This is likely due to the reputably balmy nature of the plant, associating it with the Earth element dominant in the southwest. However, the interpretation can vary across different schools of Feng Shui, emphasizing the personalization aspect of this art.

Mother of thousands harmonizes well with the Southwest-facing sector based on Feng Shui principles. The plant amplifies Earth elements, which are the ruling elements of the Southwest. It also embodies prolific growth and bountifulness, potentially accentuating the sector's life aspects of love and relationship. Note that Feng Shui is subjective and experiences may vary.

The asian self-heal plant has a harmonious vibe conducive to well-balanced energy flow. Its compatibility in the Northeast direction is tied to Earth energy as per Feng Shui. The Earthy tones of asian self-heal evidently mirror the elemental characteristics associated with this direction, offering grounding and stability.

As fits with Feng Shui principles, bigfoot potentially harmonizes with spaces holding a West-facing orientation. Eastern traditions associate the West with the element of Metal, which, in balance, can draw strength from the Earth element embodied by bigfoot. The result is a symbiosis that could promote stability and growth. Remember, Feng Shui interpretation varies, showing the importance of personal instinct alongside traditional wisdom.

The vietnamese vanilla bestows an ambiance of serenity and calmness, according to Feng Shui principles. When placed in the Southeast corner, this plant may enhance the energy of abundance and wealth, since Southeast is associated with the wood element, signifying growth and prosperity. However, Feng Shui is a deeply personal practice and these effects may vary.