In Feng Shui, the little gooseberry tree harmonizes well with East-facing sectors. This direction, identified with the wood element, aligns with the little gooseberry tree's natural growth flow, potentially fostering prosperous energy. However, remember that Feng Shui is highly personal and exact effects might vary for each individual.

The snow banana is moderately compatible with Feng Shui, due to its distinctive silhouette and unique energy vibrations which can harmonize an area. Its compatibility with a North-facing position is noted because, according to Feng Shui principles, water element is amplified therein, which can balance the snow banana's Earth attributes. This, however, is open to subjective interpretations depending on specific space layout and balance.

The simon's poplar harmonizes adequately with the East-facing direction. According to traditional Feng Shui principles, East signifies the Wood element, analogous with growth, renewal, and vigor. The simon's poplar as a tree, an embodiment of the Wood element, thus finds a natural accord in this orientation. It's crucial to understand these nuances remain open to personal interpretation and may vary with individual circumstances.

Bush allamanda symbolizes constant growth and prosperity. Its bright, yellow flowers inspire creativity and lead to a flourishing life. Positioned aptly in the Southwest direction, it complements the Earth energy element inherent in this area, thereby harmonizing the flow of positive chi around the space. However, as Feng Shui is deeply personal, its influence may vary for different individuals.

The chinese horse chestnut is a profound embodiment of balance, nurturing strong, positive energy. Facing East with chinese horse chestnut can encourage personal growth, considering the symbolic relationship between the rising sun and new beginnings. However, the effect may vary depending on personal chi and environmental factors.

The chinese tulip tree can be deemed a harmonious fit in the Southwest. Its verdant leaves and blossoming flowers stimulate the Earth element, inherent to this direction in Feng Shui. This is advantageous, yet subjective, dependent on the person's unique energy and the individual environment's needs.

The needle vine embodies energetic vibrancy, which is particularly harmonious with the energetic, fiery nature of the south-facing direction. Placing this plant in such a direction often promotes positivity and social connections, in accordance with Feng Shui beliefs. However, remember that the individual's experience may vary, and the results may not be the same for everyone.

Within the realm of Feng Shui, the flask-shaped vanda may energetically harmonize when placed in a Southeast direction. This is because Southeast represents the wood element, with which flask-shaped vanda could potentially resonate given its nature as a wood-based life form. However, as with all Feng Shui practices, subjective interpretation is key and final positioning should intuitively reflect a balance within your particular space.