In Feng Shui, the chequered daffodil is often associated with balance and harmony due to its distinct patterns. When placed in the Southwest, it substantially contributes to the enhancement of relationships and feminine energy. Its chequered flowers, in contrast with the grounded humbleness of the Southwest, could produce a unique mix of spirited dynamism and earthy stability. However, these responses to chequered daffodil may manifest differently depending on personal sensitivity and interpretation.

The prostrate sandmat is seen as harmoniously aligned with the Southwest direction in Feng Shui practice due to its tenacity and spreading growth, which symbolize the dispersal of negative energy. This aligns well with the Southwest's association with feminine earth energy, though conclusions can vary depending on personal perspectives.

In the realm of Feng Shui, the bluebell bellflower shares an intricate relationship with the North-facing direction. It is believed to imbue an atmosphere of harmony and serenity due to its delicate bloom and calming blue hue which symmetrically resonates with the water element of North direction. Even so, these theories remain subjective, open to individual interpretation and preference.

The shortleaf pine complements the South-facing direction due to its symbolization of strength and growth, a resonance with the Feng Shui element of fire, predominantly associated with the South. However, this is subjective, and a personalized consultation would be more effective in utilizing the shortleaf pine's Feng Shui benefits.

The red pine embodies wood energy in Feng Shui, which fosters growth, vitality, and upward momentum. Therefore, it is generally harmonious with the East-facing direction, traditionally associated with the element of wood, enhancing the flow of positive chi. Yet, the subjective essence of Feng Shui dictates the alignment could vary based on other environmental factors.

The kiss-me-quick is seen as harmonious when placed facing South. This is drawn from traditional Feng Shui principles that appreciate its lush, vibrant pink petals which can activate positive energy from the fire element direction—South. However, each understanding is unique; this may not resonate with all.

The calico aster is known to promote harmony and balance in Feng Shui. Its gentle blooms could potentially bring a peaceful energy into your space. This plant could be particularly beneficial if placed facing South, because this direction is associated with fame and recognition. The calico aster's subtle strength and resilience may reinforce one's aspirations in these areas. However, Feng Shui interpretations can vary, so it's always wise to consider your personal context.

Wheat complements the Southwest direction, as this direction symbolizes Earth element in Feng Shui, and Wheat in essence represents Harvest, a strong association with Earth. Hence its placement might cultivate stability, grounding energies and abundance. However, energy translations may vary depending upon individual perspectives.