The weather prophet plant is often considered harmonious with the Southwest direction in Feng Shui due to its nurturing and expansive flowering nature, resonating well with the associated Earth element in this quadrant. This should, of course, be subjectively interpreted according to individual energy flow and home circumstances.

The fragrant aralia aligns well with the principles of Feng Shui. Generally, it creates a synchrony between man and the surrounding environment. When located in the South, it can potentially harness Qì (vital energy) movement, given its nature-bound qualities. However, this might vary as the understanding of Feng Shui is open-ended and personal to each.

The apple of Sodom is moderately compatible with Feng Shui principles. When placed in a South-facing direction, it can address the fiery element associated with South in Feng Shui, given its ability to withstand arid climates and its vibrant white colors may enhance the energy of this direction. However, remember that Feng Shui is highly subjective and the results can vary depending on other elements in your space.

The savin juniper exhibits exceptional compatibility with Eastern facing spaces. Connoting strong wood energy in Feng Shui, this plant aligns well with the nurturing sunrise energy of the East. However, the plant's energies may vary with individual perception and existing environmental balance.

According to Feng Shui principles, the spring pea presents a harmonious balance of Yin Yang energy, when placed appropriately. Its compatibility with East facing direction can be associated with the plant's vibrant spring energy, signifying new beginnings and growth, much like the rising sun in the East.

The super donkey tail is suitably aligned with the Southwest direction in Feng Shui. This compatibility stems from the plant's propensity to foster calmness, reflection, and sturdy growth - qualities that resonate with the element of Earth dominant in the Southwest. Remember, Feng Shui is a personal journey and the effect might vary.

The kentucky coffee tree is deemed fitting within the Feng Shui principles when positioned eastwards. This stems from its vibrant energy aligning with the 'Wood' element inherent in the east. However, final compatibility is contingent upon an individual's personal energy landscape, serving as a gentle reminder that Feng Shui is, after all, an art of balancing personal chi with environmental energies.

The sandboxtree may carry a potent energy that may not agree with every household. For East-facing abodes, its imposing nature could inspire a robust vitality, providing a notable balance of yin and yang energies. However, homeowners should consider local wisdom and personal intuition in its placement.