Orange guarinanthe nurtures a vibrant resonance, aligning positively with the principle of balance and flow in Feng Shui. Positioned in the South-facing direction, this plant reinforces the sector's correlated element - Fire, given its vivacious orange hue, theoretically rendering a conducive atmosphere for igniting fame and recognition. However, due to Feng Shui's inherent subjectivity, effects can vary significantly.

The fernleaf lavender is deemed potentially harmonious in a Southwest-facing space within Feng Shui principles. The plant's round shape and lush pattern may dissipate sharp energy or "Sha Qi". These traits might facilitate ambient balance in a space typified by Earth elements, often associated with the Southwest. This is, however, subject to many other variables in one's Feng Shui practice.

As per Feng Shui, chinese angelica is considered versatile with most orientations. Crucially, when placed facing South, it aids in manifesting the resident's unseen ambitions. This compatibility is attributed to the plant's strong yang energy, which complements the vibrant, fiery energy associated with the southern direction. Remember, Feng Shui results can often be subjective, varying with individual scenarios and perceptions.

The purplehead sneezeweed plant exhibits moderately auspicious energies, particularly when placed in southern-facing locations. This direction complements the purplehead sneezeweed's properties, fostering positive flow and harmony. However, interpretations vary, and geographical, seasonal, and personal factors could alter this compatibility.

In Feng Shui, japanese garden juniper harmonizes well with an east-facing direction. This is traditionally seen to stimulate the Wood element and encourage growth which perfectly complements this plant's nature. However, the precise compatibility may vary, as Feng Shui contingent upon the interrelation of numerous Elements in your space.

Monkey grass or Monkey grass, known to stimulate the growth of energy (Chi), is usually seen to be more compatible with an East facing direction. This is due to its mode of growth, which spreads out and fosters the Wood element, a significant component in the Eastern sector of Feng Shui. However, individual experience with this plant's Feng Shui influence can vary.

The maryland senna is largely in sync with the principles of Feng Shui due to its balanced energy flow. Specifically, it harmonizes well with an East-facing direction, often associated in Feng Shui with health and family. The maryland senna's green hue and vibrant energy may bolster this connection, although interpretations may vary.

The marlberry plant embodies a harmonious energy, thus complementing the north-facing direction well. In Feng Shui, north-facing symbolizes a path to prosperity and growth, mirroring the plant’s naturally upward growth pattern. However, interpretations may vary embracing the subjective essence of Feng Shui.