Feng Shui suitability of downy Yellow Violet holds subjective interpretations. Many cite their gentle yellow color effectually aiding to welcome wealth energy, as associated with Southwest direction. The softness of 'Downy', may geographically pacify the fiery element of Southwest, fostering a harmonious environment.

The scotch laburnum carries a natural propensity for harmony when planted in relation to the West. Its solid, wood-based nature evokes the Wood element in Feng Shui, which feeds the Fire element representative of the West direction. However, the subjective interpretation of Feng Shui varies greatly, suggesting potential variances in the effectiveness of this placement.

The common Hoptree harmonizes favorably when placed in the Southeast direction. This is based on Feng Shui principles that believe tree and wood elements support wealth and prosperity, commonly associated with the Southeast. However, experiences may vary, thus personal interpretation is advised.

The red latan palm is considered in Feng Shui to establish a sense of peace and calm, making it respectful for the Southeast, an area associated with wealth and abundance. Its lush leaves subtly symbolize ever-growing prosperity, yet the effects may vary depend on individual interpretations and placements.

The adlay plant is deemed harmonious with the Northeast direction in Feng Shui culture. This stems from the plant's earthy, grounding energy, which resonates with the Earth element dominant in that direction. However, interpretations can vary, respecting the fluid nature of Feng Shui perspectives.

The steeplebush plant tends to flourish under well-lit conditions, aligning it harmoniously with north-facing arrangements, as this direction promotes clarity and insight according to Feng Shui principles. However, the strength of this compatibility may be subjective, shifting under differing perspectives.

The mexican Lobelia holds a fascinating aura with neutral Feng Shui energy, which makes it a palatable addition to various spaces. Working harmoniously with a North-facing direction, it snugly fits into Water element's domain, symbolizing career growth and wisdom. Its warm thriving nature subtly echoes the Feng Shui principle of fluidity and movement. Please note that the balance it brings can vary, reflecting the intricate subjectivity of Feng Shui.

The rough maidenhair fern plant embodies a steady growth and distinct tranquility, which complements the energy of the East direction. As per Feng Shui principles, the East represents dawn and renewal - a harmony that rough maidenhair fern resonates with, potentially influencing a positive flow of Qi in your space.