The presence of lady's slipper orchid may enhance the 'water' element of a north-facing room. In Feng Shui, the correlation between water and the north supports a balanced flow of energy. Yet, interpretations vary based on individual circumstances and settings, making this observation a suggestion rather than an established fact.

The myrtle wattle evokes a sense of grounding and security, fitting for those seeking stability. Ideal for East-facing directions, its natural element aligns with the Wood element of East, enriching the positive energy flow. However, every setting's unique energetic rhythm commands a different response to myrtle wattle, adding a layer of complexity to its Feng Shui compatibility. Therefore, personal interpretations may vary.

The scarlet Passion Flower is assumed to harmonize well in South-facing locations due to its crimson flowers, echoing the strong Yang energy of Fire associated with the South. It should be noted that Feng Shui's interpretations vary across practitioners and regions.

The red leaf palm's reddish hues are known to stimulate energy and motivation, often related to the element Fire in Feng Shui. This vibrant plant would theoretically harmonize well in a North-facing setting due to the symbolic function of this direction, which represents career progression and path in life. However, the subjective interpretation of Feng Shui practitioners and experienced enthusiasts may vary.

The cardwell lily is speculated to harmonize effectively with a North orientation. This supposition draws from the plant's natural affinity for water, which resonates with the North's elemental association in Feng Shui, fostering a productive energy balance. Yet, interpretations in this divinatory art do vary widely, reflecting its inherent subjective nature.

Petrocodon coccineus may harmonize well in the Southwest region, often related to love and relationships in Feng Shui. Placing petrocodon coccineus here symbolizes vibrant energy and could foster nurturing relationships. However, it's essential to balance this with personal intuition and room aesthetics. Remember, the art of Feng Shui is fluid and highly subjective.

The babies' toes plant is subtly harmonious in Feng Shui practice, especially when facing South. Its petite, ground-hugging growth symbolises a well-grounded life and its resiliency against harsh conditions parallels overcoming life's challenges. The South, being a conduit for the warming Fire element, complements the babies' toes plant's sun-loving nature, thus bringing a balanced and modestly vibrant energy into your space. This harmonious alignment, however, remains a suggestive observation within the compass of Feng Shui.

The spreading Rush widens its reach in harmony with the North-facing direction, generally perceived to be associated with fluidity and tranquility. This harmony resonates with the underlying Feng Shui principles, invigorating surroundings with a sense of peace and serenity while respecting the ebbs and flows of energies.