The nosegay tree symbolizes natural beauty and grace, playing a positive role in enhancing Feng Shui. Particularly harmonious in the South-facing sector of a space, its association with fire element fosters both prestige and passion. However, this plant's energy can manifest differently, hence should be considered with the overall Feng Shui design in mind.

Cape honeysuckle is seen as highly compatible with south-facing locations owing to its vibrant hue, symbolising fire, an element ideally suited to this direction as per Feng Shui principles. However, the suitability could depend on personal energy preferences and surroundings.

In Feng Shui, common blue violet echoes vibrancy and life energies, possibly suggesting a moderate compatibility with areas favoring growth and rejuvenation. It's advised to place common blue violet towards the North symbolizing the Water Element, harmonizing with the plant's inherent vitality. Due to the subjective nature of Feng Shui, individual experiences with the plant may vary.

The garden star-of-bethlehem harmonizes with the subtle energy paths when placed in the Southwest which, interestingly, coincides with the Earth element in Feng Shui. This offers stability, nourishing and supportive energy - a satisfactory pairing, if one were to believe in Feng Shui principles.

Empress tree is considered moderately compatible in Feng Shui practice. However, like many elements in Feng Shui, the interpretations are subject to individual perspectives. Positioning empress tree towards Southeast harnesses its attributed symbolism of growth and new beginnings, believed to promote a positive flow of energy. The reason behind this alignment might be subjective and based on traditional beliefs.

In Feng Shui, the hiba has a sturdy and resilient aura which harmonizes with the elemental characteristics of the Northeast direction, embodying the firmness of the Earth. While individual experiences may certainly vary, the lush green hiba might bring balance and stability when placed in this particular zone. Remember, the interpretation of Feng Shui practices does involve a degree of personal intuition and vision.

Catnip is deemed a harmonizing addition to any home, according to traditional Feng Shui perspectives. When positioned in the North sector, it is believed to stimulate directional prosperity due to its green foliage, symbolizing steady growth. However, the Feng Shui implications may vary, embracing personal perceptions and environments.

The chinese St John's wort is widely seen as harmonious within the realm of Feng Shui. South-facing placements amplify its beneficial influences, as this direction symbolizes fame, reputation, and light — all of which are aligned with chinese St John's wort's sunny disposition. However, its compatibility may vary based on personal energy and intention, reinforcing the multi-faceted complexity of Feng Shui.