The woolly cobweb houseleek holds a unique synergy with Southwest-facing spaces. In Feng Shui, the Southwest represents the Earth element and nurturing energy, harmonising well with the woolly cobweb houseleek's rugged aesthetic and survival abilities. However, perceptions can vary due to the deeply personal nature of Feng Shui practice.

The largeflower phacelia is intriguing in its Feng Shui compatibility, blending auspicious energy with potential nuances. It's particularly harmonious with the Southeast direction, as this zone links with wealth in Feng Shui, resonating with the plant's bountiful blossoms. However, Feng Shui interpretations can widely vary, so personal intuitions are key.

The japanese beech fern is a Feng Shui friendly plant, exhibiting a soothing, calming energy, perfectly suited for spaces seeking serenity. Its compatibility with North-facing surroundings connects to water energy, as the North symbolizes water in Feng Shui, and the delicate form of japanese beech fern subtly references flowing water.

The white inside-out flower aligns well with the principles of Feng Shui due to its balanced, subtle energies that can harmonize an environment. Particularly facing West, it symbolizes introspection and relaxation, fitting for the transformative, descending energy of this direction, and thus fostering serenity. However, the interpretation of Feng Shui is deeply personal, and each individual's reaction to white inside-out flower can greatly vary.

The nettleleaf giant hyssop emanates vivacious energy, a balanced complement to Southeast-facing positions, often regarded as the sector of wealth and wind. Its lush foliage symbolizes a robust flow of chi, signifying prosperity and accomplishment, an ideal alignment with the dynamic energy of this direction. Yet, remember, Feng Shui interpretations can highly vary.

The east asian sage or Salvia japonica is affiliated with a certain intrinsic vigor conducive to North-facing aspects. This compatibility can be traced to the contemplative nature of the plant reflecting the North's association with tranquility in Feng Shui philosophy. However, this observation lends itself to interpretation, substantiating Feng Shui's inherent subjectivity.

The bitter tomato plant radiates a robust energy, often aligning harmoniously with southern-facing homes. The reason can be traced back to the fire element associated with the South which uniquely resonates with this plant's profound potency. But again, the subjectivity of the Feng Shui arts necessitates personal discretion in determining the plant's compatibility.

Integrating red stonecrop in southern arrangements enhances chi, due to its warm, passionate hue resonating deeply with the fire element associated with south. Its robust nature echoes the lively, active energy of this direction. However, applications might vary based on personal circumstances and interpretations of Feng Shui.