In Feng Shui theory, the poke milkweed plant coheres elegantly with a South-facing placement. The South signifies fame and recognition in your life. The attributes of the poke milkweed plant--its height, elegance, and spiky flowers--symbolize upward movement, fittingly lending its energy to this direction. Remember, interpretations of Feng Shui can vary widely, and this take may not resonate with all practices.

The silverrod plant aligns favourably with the Northwest direction. Experts posit that wielding its bright spots and slender silhouette aids in balancing the metallic energy typical of this direction, subtly inviting prosperity and stability. These relationships, however, are subject to personal interpretation within the Feng Shui tradition.

The hollyhock Begonia is a delightful choice for enhancing a home's Feng Shui. Its green foliage bestows a harmonious and balanced feel, ideally suiting a South-facing environment. This favorable alignment is said to amplify personal growth and prosperity. However, the complex art of Feng Shui varies, and this may not hold true for every individual or circumstance.

Given its nature, the didymostigma obtusum exhibits a modest compatibility with West-facing locales in Feng Shui. This might be attributed to the plant's intrinsic properties aligning with the 'gold' element predominant in the West. However, the applicability is quite subjective and doesn't guarantee shift of energies towards greater harmony.

The princess flower is considered tolerably harmonious with the North-facing direction. This association is a reflection of the plant's vigor and resilience, qualities that are emblematic of the water element, predominant in North in Feng Shui cardinal direction system. The positioning, however, remains a matter of experienced interpretation and personal adaptation.

The prostrate speedwell is thought to harmonize with an Eastern facing direction following Feng Shui principles. This stems from its vibrant blue flowers, which symbolize growth and regeneration, mirroring the sunrise in the East. However, interpretations may vary as Feng Shui is a deeply personal and subjective practice.

Carrot fern is in alignment with the harmony of East-facing entrances, believed to believe to bring prosperity, according to Feng Shui principles. However, individual experiences may differ due to the subjective nature of Feng Shui.

In Feng Shui, the diamond-leaf persimmon can complement spaces facing North. Its diamond-shaped leaves signify stability and balance—key characteristics pertaining to the North's symbolism of career and life path. This compatibility, however, largely bases on individual intentions and interpretations, thus varying uniquely across different observers.