The crape jasmine harmonizes quite well with the East direction due its associations with growth and prosperity. Its featured pinwheel design is suggestive of rotating energy, which perfectly corresponds with the cyclic transformative nature of sunrise, typically happening in the East. However, it should ultimately be situated in relation to inhabitants' personal Kua number for best results.

Green amaranth compatibility is considered to strike harmonious tones with Southeast-facing placements. The lush verdant hue of green amaranth may stimulate Wood element energy typically associated with East and Southeast, offering life force prosperity and growth echoes.

The pepper vine plant, in relation to Feng Shui, marries dynamic growth with strong wood element energy, making it a notable choice for imbuing a space with stability and renewal. Its compatibility with Southwest-facing rooms is worth acknowledging, as it harnesses the Earth element energy which governs this direction, creating a harmonious balance of flourishing and grounding vibrations.

The southern maidenhair fern is harmonious with Southeast exposure. This comes from Feng Shui principles, where Southeast represents wealth and abundance. The plant's ability to purify air and ensure good health is an added asset for prosperity. Remember, individual interpretations may vary.

The mountain hydrangea exudes an energy believed to harmonize with the Southeast bound energies. This is attributed to its deep-rooted strength, which in Feng Shui principles, mirrors that of the traditional wood element linked to this direction. However, one's experience may vary as Feng Shui's impact can be subjectively perceived.

According to principles of Feng Shui, kahili ginger is deemed suitable when facing South. This is primarily due to the plant's vibrant, fiery yellow flowers, harmonizing with South's element of fire in Feng Shui philosophy. Still, interpretations differ among practitioners and vary with personal perceptions.

In Feng Shui, the smooth sumac plant is believed to harmonize with South-facing directions, often associated with the element of fire. Its pointed leaves signify the fire element, promoting motivation and success. It's of importance, however, to note the subjectivity in Feng Shui practices and interpretations.

The flame azalea is often associated with fiery enthusiasm and positivity, making it compellingly compatible with Feng Shui principles. Particularly when placed in the South quadrant, it is believed to stimulate recognition and fame because South corresponds with fame in the Bagua, thus reinforcing warmth and illumination. However, the integration of Feng Shui is highly personal and subjective, hence one should trust their intuition about what feels right for them.