African flag is seen as generally harmonious in Feng Shui, exhibiting a balance in both textual and symbolic ways. Its vibrant colors and unique silhouettes hold bountiful energy. Traditionally Southwest is a favorable placement for african flag, as it represents the earth element which complements the robust nature of the plant. It's important to acknowledge the subjective nature of these suggestions, as individual experiences may vary.

The tamanu subtly radiates Yang energy, upholding a fine balance with its Yin attributes. Facing North, it bolsters Water element representing career success and life path. Yet, the harmony of tamanu's place in the Feng Shui ecosystem is for personal discernment, as it harmonizes differently in varying spaces.

The texas lantana resonates well with the earth energy in Southwest facing homes. This compatibility can be attributed to its vibrant colors, potentially aiding the enhancement of love & relationships - an aspect symbolized by the Southwest in Feng Shui. However, every household possesses unique energies, thus varying the impact.

The mountain sandwort has an agreeable affinity with Southwest-facing areas. This is said to be due to its sturdy qualities mirroring the steadfastness often linked with the Earth element, predominant in the Southwest direction. However, interpretations may vary, reflecting the mutable nature of Feng Shui.

The houndstongue harmonizes well in the Northeast direction, acting as an auspicious adjustment. Complementing the earth energy resonating from the Northeast, this plant encourages stability and nourishment of relationships. However, the complexity of Feng Shui suggests a myriad of interpretations; this guidance may function differently in individual settings.

The royal azalea brings a harmonious energy in Feng Shui, especially when placed in the eastern part of your home or garden. East corresponds to the Wood Element in Five Elements theory, which holds an emblematic connection with plants. Hence, the royal azalea is deemed quite compatible with this direction. However, this view should be adapted based on specific local conditions and personal interpretations.

The black tea-tree exudes potent grounding energy, an essential attribute in Feng Shui. When positioned in the southern direction, it encourages growth and progress, echoing the southern attributes of fire and advancement. However, interpretation of Feng Shui principles can be subjective and it's essential to feel a sense of harmony when positioning your black tea-tree.

The rabbitear iris exhibits a compelling harmony when positioned in the Southeast. Its vibrancy resonates with Feng Shui's Wood element, fortifying trust, growth, and the renewal of life, all traits associated with this direction. Yet, it's crucial to realize that individual interpretations of Feng Shui may vary considerably.