Mock privet, upheld by Feng Shui principles, carries a favorable synergy with East-facing locations. Rooted in its optimistic, verdant hue, mock privet functions as a form of vibrant, life-sustaining Wood Element. This combination naturally augments the universal ch'i in East-facing settings, subtly promoting good luck and prosperity in a nicely balanced way.

The winged-stem passion flower, due to its majestic wing-like stems, symbolizes ascension and growth. Its presence is believed to harmonize the Qi flow, making it a suitable plant for the South-facing direction. The dominance of Fire element in this direction can be harmoniously balanced by the plant's Wood-properties, thus, there is a sense of compatibility. Yet, remember this analysis may not reflect every scenario, as Feng Shui outcomes are incredibly individualized.

The spiny amaranth aligns well with the western aspect of your space, symbolizing growth and adaptability. Its robust and resilient characteristics are akin to the metal element of the West, often promoting a robust sense of strength within the environment. However, remember this perception varies, reflecting the fluid nature of Feng Shui.

The propeller plant holds a promising resonance with the Northwest direction in Feng Shui. This suitability might derive from the plant's robust, upward growth which symbolizes progress and advancement, fundamentally harmonizing with the Northwest's metaphysical connotation of aide and support. However, as Feng Shui interpretations can be multifarious and personal, one should adapt these insights to their specific context.

The plant common blue wood-aster is widely accepted in Feng Shui for its harmonizing properties. Ideally, it should face North, a direction associated with water element. This corresponds to the wood element of common blue wood-aster, which receives nurturing energy from water in the productive cycle of five elements in Feng Shui. But it is wise to heed that the resonance of this vitality can differ based on individual perception and environmental nuance.

The african spotted orchid exhibits a considerable alignment with the Eastern facing direction. Its vivid spots mirror the rising sun, a symbolism resonating with the energy of the East in Feng Shui. However, each setting has unique energy flows, making the relationship between the african spotted orchid and East-facing alignment subject to interpretation.

While the honeyvine isn't explicitly mentioned in traditional Feng Shui literature, its propensity to quickly and strongly establish itself can be interpreted as a symbol of resilience, grounding, and prosperity. Opt for a North-facing location for honeyvine, a compass direction associated with building patience and endurance, harmoniously reflecting the plant's inherent robust nature. As with all Feng Shui suggestions, personal perception and comfort matters extensively, thus the compatibility might vary for different individuals.

The green foxtail is regarded as a desirable vegetation in Feng Shui, especially when placed in the Southwest area of the home. Its lush green hue invigorates positive energy while its structural vertical growth promotes ascension - corresponding favorably to the element of Earth dominant in this direction. Nevertheless, applicability may differ according to personal interpretation and context.