The whale's Tongue Agave aligns favourably with Feng Shui design, exuding soothing energy. This plant is particularly compatible with a Southwest-facing direction, often associated with love and relationships in Fen Shui. The robust, heart-shaped leaves of whale's Tongue Agave may symbolize resilience in relationships, subtly bolstering the peaceful aura of the space.

Due to the tenacious nature of smooth crabgrass, it aligns well with the North, symbolizing career growth and one’s journey in life. Its adaptability in different environments implies resilience—vital in navigating life's paths. Like most Feng Shui aspects, interpretation may vary from person to person.

The gordonia exhibits a certain synergy with the West-facing direction. This element of placement is founded on the plant's growth tendencies that harmonize with the principle of Metal in Feng Shui, typically associated with West. However, Feng Shui is a highly individualized practice, making ultimate placement dependent on personal surroundings and circumstances.

The formosa firethorn is harmonious with a southern facing direction, thanks to its vibrant red berries reinforcing the Fire element associated with South, creating a subtle bidirectional symbiosis. However, its compatibility should be individualized, considering Feng Shui is a highly subjective field.

Northern Maidenhair Fern subtly increases the Feng Shui value of a space, encouraging a balanced and harmonious environment. Its delicate, lush green fonds can serve as a focal point for positive chi flow, enhancing prosperity and wellness. Positioned in the North sector, northern Maidenhair Fern aids in career growth, as the North is traditionally associated with water element in Feng Shui and the plant's natural affinity for water symbolizes adaptability required for professional success.

The smooth witherod aligns well with the principles of Feng Shui. Its vibrant energy can refresh stagnant Qi (energy) and promote harmonious flow, especially beneficial when placed near the North-facing direction. This has been associated with its vibrant water element, resonating with the true nature of North, which symbolizes water in Feng Shui tradition. However, remember the experience of Feng Shui differs and one should follow their intuition.

The burflower tree tree, in Feng Shui, harmonizes perfectly with a Northwest-facing location. This direction resonates with the plant's rounded leaves, referencing the supportive, metallic energy that the Northwest direction symbolizes. Considering the many interpretations of Feng Shui, this advice should be applied with subjective discretion.

The serrulate penstemon plant does possess a considerable potential for compatibility in a North facing position. The plant's sturdy structure may symbolize a strong support system, apt for the North's representative element - Water in Feng Shui, insinuating a desirable stability. Nevertheless, the perception of Feng Shui differs vastly among individuals, hence the suitability of serrulate penstemon remains largely subjective.