The whimsical fishbone cactus harmonizes well with Eastern-facing installations. Its cascading branches suggest flowing water, a powerful symbol of growth and prosperity in Feng Shui. Its angular leaf pattern further encourages the flow of positive Qi, boosting the positive energy of East, the direction associated with family and health. This compatibility, however, warrants individual interpretation, respecting the idiosyncrasies of each given Feng Shui circumstance.

The red amaranth aligns well with the South-facing homes. Its prominent red coloration harnesses the Fire element. As South corresponds to this same element in Feng Shui, it fosters a harmonious balance of energies. However, one's personal experience might vary based on individual interpretations and unique energy flow.

The rattail cactus is considered relatively compatible with the South-facing direction in Feng Shui. This assertion stems from the symbiotic relationship between South, associated with the Fire element, and the plant's perseverance and resilience, symbolising the Earth element. This balance can assist in enhancing the chi flow. However, each Feng Shui circumstance is unique and should be interpreted with flexibility.

The lady's mantle aligns well with Feng Shui principles, producing harmonious vibrations in a living space. Its soft green hue embodies a tranquil essence, fostering serenity and balance. When positioned in the Northwest, it attracts positive chi - traditionally associated with helpful people, blessings, and travel. However, its compatibility may fluctitate based on personal Feng Shui interpretations.

The misty plume bush is harmonious with the principles of Feng Shui. Particularly with a North facing direction, it amplifies tranquility due to its lusher character, leading to a more serene environment. However, individual experiences may variate, hence, adding an element of subjectivity.

The pawpaw exhibits a moderate level of Feng Shui compatibility. Predominantly embodying a vibrant energy, it can harmonize well with a North-facing direction, likely due to the association of water's fluidity with this orientation. However, the matter of personal interpretation and subtle variations between practices must be remembered in Feng Shui.

The flowering quince finds its strength in belonging to South-facing sectors. Its fiery red blossoms are believed to resonate with the element of fire, the symbol of the South. This provides an invigorating energy and encourages vitality. However, the potency might differ depending on personal Qi and the plant’s environment.

With its harmonious mix of warm colors and robust growth, the plains coreopsis manifests an energetic yang principle. This makes it preferable for the South-facing direction where the Fire element dominates, according to Feng Shui. Its placement in this area stimulates vitality while maintaining a delicate balance with the surroundings.