The black ridge oak harmonizes well with East-facing environments. It's primarily due to the plant's strength and fortitude which resonate with the robust energy of the East. However, subtle variances in individual perception of Feng Shui might alter this understanding.

The Feng Shui Compatibility of canadian anemone is perceived as promising, attributed to its ceaseless growth and captivating blooms. The plant's orientation toward Northwest is considered harmonious, drawing from Feng Shui's principles of fostering prosperity and unearthed potential. However, personal experiences with canadian anemone will likely add further layers of interpretation to its energy dynamic.

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 chinese sumac aligns well with the South-facing direction, perhaps owing to its origins in warm Asian territories. This placement promises essential chi energy flow, nurturing wealth and success, although the results can vary widely.

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.