The dwarf aeonium plant illustrates ambiguous associations with Feng Shui, carrying an indefinable energy that typifies its unique nature. As per its potential compatibility with Southwest facing directions, it's reckoned to be moderately synchronistic. The reason can be linked to the element of Earth, common for Southwest, harmonizing with the grounded, stable energy of the dwarf aeonium.

Donkey ears could serenely meld with a Southwest-facing setup, often associated with relationship and companionship in Feng Shui. Robust plants are typically favored in this orientation. As donkey ears thrives without excessive upkeep, it emanates inner strength, subtly fostering unity and stability in the environment. However, varies personal interaction with donkey ears exist, making the interaction uniquely individualistic.

The money tree aligns harmoniously with Feng Shui principles of growth and prosperity. Especially interesting is its propensity for eastern directions. The East signifies family and health in Feng Shui; the five leaves of the money tree vouch for these elements thus enhancing that energy. Nevertheless, remember that the experience of Feng Shui and its effects are deeply personal and could differ markedly.

The spreading hedgeparsley plant aligns well with the energy flow of the Northwest direction. Its unassuming yet pervasive growth patterns may theoretically correspond to the metal element in Feng Shui, symbolizing steadfastness and resilience. This makes it an intriguing fit for spaces requiring a subtle dose of such energies. Yet, the nuanced interplay of Feng Shui elements could resonate differently with everyone, hence further exploration is advised.

Darwin's orchid's elongated form and pristine white flowers suggest a strong affinity for direction North, a spiritual conduit of hidden wisdom and tranquillity. However, individual perception may cause varied responses. Professional consultation is recommended to explore personalized Feng Shui alignments.

The ngaio exhibits intriguing harmony with a West-facing direction. This tree vitalizes the metal element, associated with West in traditional Feng Shui, by passively encouraging the flow of Chi. However, interpretation varies, and the user's personal affinity should be considered.

The zebra plant is moderately well-suited for East-facing spaces. Its vibrant green leaves and striped pattern symbolize growth and movement, which can harmonize with the wood element dominant in the East. However, the zebra plant's preference for indirect light may conflict with this direction's naturally bright energy.

The hairy alumroot could help harmonize energy in a Southwest-facing zone due to its robust features and grounding energy, as per Feng Shui theories. It's important, though, for each individual to feel a positive connection with the plant which is unique and personal.