The sugar apple is moderately compatible with Feng Shui principles. It is said to embody organic growth and fertile blessings. As far as direction is concerned, North-facing is favourable. This position harnesses the plant's inherent water-associated energy, corresponding to North's water element in Feng Shui. However, different interpretations may exist.

Lyreleaf sage is considered harmonious in alignment with the Southeast direction in Feng Shui. This is attributed to the plant's flowing, flexible growth pattern which mirrors the characteristics of the Wood element, naturally ruling the southeast. However, interpretations vary depending upon personal intuition and the surrounding environment.

Coltsfoot is considered fairly neutral in Feng Shui. Its broad leaves are seen as an embodiment of balance and stability. When faced West, coltsfoot may promote a harmonious flow of energy, due to the West's associations with creativity, which can be fostered by the plant's inherent tranquility. However, the interpretation can vary depending on individual perspectives.

In terms of Feng Shui, the crimson clover harbors prosperous energies due to its vivid red color, often associated with joy and luck. When placed in the South, it may help stimulate conversation and promote recognition, resonating with the element of Fire predominantly seen in this direction. Although subjective, this suggestion could complement one's Feng Shui endeavors.

Spinach holds a harmonious resonance with the Eastern direction, favorably channeling universal energy, or Chi. This association roots in the East's representation of health and longevity, reflecting the plant's nutrient-rich properties. However, Feng Shui interpretations vary, making this compatibility circumstantial.

In Feng Shui terms, the quaking aspen aligns harmoniously with Eastern directional energies. As per principles, the East represents growth and family, a natural alignment with quaking aspen's characteristic of rapid growth and communal growth pattern. The exact degree of compatibility, however, is always subject to personal interpretation and varying factors.

The butter-and-eggs lends an harmonious, balanced ambience to the environment. Its vibrant colors promote positive chi, boosting prosperity and contentment. Being perfectly suited for the North direction, it links with Metal and Water, representing career prospects and personal growth. However, interpretation can differ as Feng Shui is deeply personal and innately fluid.

The flaxleaf fleabane plant appears to harmonize favorably with Feng Shui principles when placed in an East-facing direction. As Feng Shui espouses, East is governed by the Wood element, which signifies burgeoning life and growth. With the flaxleaf fleabane's vigorous nature, this association can potentially amplify the lifeforce energy, or Chi, in one’s environment. However, interpretations may vary based on individual perceptions and specific Feng Shui traditions.