Caricature-plant is seemingly quite congruous within the realm of Feng Shui, especially when placed in a Westward direction. The plant's beautifully shaded leaves, oscillating between green and red, subtly symbolize the balance between life energies, thus fostering harmony. As west facing direction often embodies creativity, the vibrancy of caricature-plant might enhance this element. Mind you, Feng Shui is a personal journey, so individual interpretations may vary considerably.

The trailing abutilon can harmonize with the energy flowing from the Southwest. This is largely due to its trailing growth habit which can symbolize the flow of positive energy, aligning with the earth element intrinsic in Southwest Feng Shui. However, the ultimate perception remains a personal consideration.

Spanish bluebell is often deemed compatible with the North facing direction. Its vibrational energy is speculated to harmonize with the Water element, which is the dominating energy in the North according to Feng Shui concepts. However, remember that individual results may vary.

The kangaroo vine exudes a robust and spirited energy, putatively harmonizing well with North-oriented spaces, often associated with Water element in Feng Shui. The plant's vibrant growth symbolizes ascending fortune, potentially boosting the water’s fluidity & prosperity flows. Kindly observe your own energy and preferences when applying this principle.

The scotch heather resonates with a potent life force, making it compatible with the Northeast direction in Feng Shui. This compatibility is largely because the Northeast symbolizes knowledge and meditation in Feng Shui practice, and scotch heather is known for its calming properties and ability to induce reflection. However, the implications are complex, and as always, individual experiences with Feng Shui may vary.

Ivy-leaved cyclamen aligns harmoniously with West-facing directions. This compatibility arises from the symbolization of the West with the Metal Element. The ivy-like pattern of ivy-leaved cyclamen persuasively echoes the intricate metalwork often associated with the West. This may foster a sense of refined elegance and tranquility, enhancing the nurturing and positive energy flow in your space. Always remember, Feng Shui experiences are deeply personal and highly subject to individual perceptions.

Radish is generally harmonious when placed in the Southwest facing direction. The robust growth and round shape of its root signify prosperity and abundance, which aligns with the Earth element associated with Southwest. This can invite positive energy and create a balanced atmosphere.

The argyle apple adheres perfectly to Southern orientations in Feng Shui principles. The south-facing position encourages the plant's inherent yang energy, amplifying its ability to evoke a sense of vitality and vigour. However, do take into account personal Feng Shui elements, as each individual's energy matrix varies.