The golden trumpet-tree resonates positive energy in Feng Shui due to its lustrous yellow flowers. This tree, when placed in the South, signifies the element of fire, which the vibrant hue of its blossoms enhances. Its potential of fostering wealth, prosperity, and brightness in personal growth is deemed desirable. However, the interpretation remains open, given the personal and multi-faceted nature of Feng Shui.

The martagon lily offers balanced energy when placed in Southeast-facing areas of the living space. This direction is symbolically linked to wealth and abundance, possibly complementing the plant's vitality and exuberant growth. However, remember that Feng Shui interpretations can vary widely, and it's best to align your personal intention with your space arrangement.

Germander speedwell is deemed to be harmonious when oriented towards the North. This is because its small blue flowers are believed to embody the energy of water, a characteristic element of Northern direction as per traditional Feng Shui philosophy.

The japanese knotweed has a somewhat ambiguous compatibility in Feng Shui. Its fast-growing nature may symbolize quick advancement, making it seemingly suitable for the Southern direction. However, remember that its invasiveness can also be interpreted as overwhelming, which may overstimulate the fire element typically associated with South. Therefore, consider your personal energy and circumstances when choosing this plant.

The indian sedum plant is subtly harmonized with the Northeast direction in Feng Shui. The reason behind this is deeply rooted in its nature to thrive in minimalistic environments, which aligns well with the Northeastern domain, typically connected with spiritual growth and self-cultivation. As always with Feng Shui, please apply these observations with a grain of salt, as the ultimate consideration must be the overall harmony of your space.

The american beech is seen as a neutral entity in Feng Shui. It may contribute to a harmonious energy flow, especially when placed in the Northwest-facing area of your dwelling. This is linked with the Northwest's attribute as a hub of helpful people and travel, potentially fostering beneficial relationships and opportunities. However, interpretations can differ, reflecting the nuanced nature of Feng Shui.

From a shenanigans' perspective, the compatibility of old man's beard within traditional Feng Shui practices is somewhat mixed. This prolifically flowering vine, usually favors East facing positions. As East is linked to Family and Health in the Bagua, old man's beard signifies longevity and rejuvenation, echoing its perpetual blooming nature. However, personal perception and broader landscapes can shift these dynamics significantly, reminding us that Feng Shui is fluid and individualistic.

The goldfish plant complements North-facing rooms, traditionally linked with Water in Feng Shui, reinforcing balance and flow. It's said to synergize fluidity and direction, mirroring the agility of a goldfish. However, interpretations vary greatly, and personal resonance with the plant is just as essential.