The nodding thistle can be seen as a symbol of resilience and courage, each nodding head pushing upwards against adversity. In a southern position, it might inspire perseverance, tapping into the South's fiery and energetic qualities. However, given Feng Shui's subjective nature, its compatibility can change according to individual perspectives.

The firecracker flower is said to carry positive energy, making it a satisfactory choice for Feng Shui application. Especially when placed in the South, it encourages abundance and well-being due to its fiery hues, resonating well with the element of fire, a dominant aspect of southern Feng Shui. This, however, can be interpretive and depend on individual Feng Shui practices.

The scarlet morning glory has a moderate compatibility with Feng Shui principles. Its vibrant red color, emblematic of the Fire element, invigorates life energy or 'chi' within a space. Facing South, this plant can augment positive energy due to the alignment of the Fire element with the South direction, symbolically known for fame and recognition in Feng Shui. Yet, keep in mind that Feng Shui interpretations can vary considerably among practitioners and applications.

The fernleaf yarrow is an ardent enhancer of positive chi, particularly harmonious with a South facing direction. Its bright, golden flowers imbue an area with the fiery energy correlated with South, thus endorsing prosperity and recognition. However, like all elements in Feng Shui, achieving equilibrium requires thoughtful placement and complimentary companions.

The large bullwort exhibits favorable Feng Shui properties. Its verdant leaves correspond with the Wooden element, often associated with growth and vitality. This quality may potentially enhance the Chi energy when placed in the North of a space, traditionally linked with career and life paths. Please note, interpretation of Feng Shui principles varies, and this suggestion should be customized based on individual circumstances.

The kiwi aligns well with Feng Shui principles, its vibrant green leaves and distinct fruit symbolize abundance. Facing Southeast, its vitality can support the Wood element in this region, promoting growth and prosperity. However, precise energy flow may vary according to individual interpretations of this art.

The painted echeveria aligns harmoniously with the tranquil setting of the Southwest. This is auspicious considering Southwest's affiliation with love and relationships, embodied by the plant's intricately patterned leaves that symbolize deep connections. However, it's always about the ideal balance, so individual reflections on the painted echeveria's energy are vital.

The marsh bristlegrass is a rather amenable accompaniment in spaces facing South. Its deep green hues evoke the element of Wood, believed to stimulate vibrancy, growth, and prosperity. Yet, as per Feng Shui principles, perception varies and the ultimate harmony relies on the individual's perspective and interaction with the marsh bristlegrass.