The pine-cone plant pairs exceptionally well with a Northeast-facing direction essence due to its ability to reinforce Earth energy. Its robust shape also symbolizes endurance and longevity, making it an implicit reminder of slow, stable growth in often neglected areas of life. However, as with all elements of Feng Shui, the impact of the pine-cone plant varies dramatically depending on personal outlook and environment.

In regards to Feng Shui, the black maple supports growth and renewal, thus being in harmony with the East, which signifies health and family. However, as Feng Shui is a matter of personal perspective, this should serve only as a general guideline rather than a defined rule.

The sweet Betsy embodies an energy-pattern that aligns well with Northeast-facing environments. This tends to propel serenity and nurturance to spaces, courtesy of its robust vitality. However, each experience with Feng Shui can vary; therefore, it's advised to contemplate one’s personal resonance with the plant.

The candyleaf can harmonize well with a Northeast-facing direction, a conjecture brought forth by its natural vitality and evergreen nature. This position allows the plant to invite auspicious energies and cultivate a gentle sense of tranquility in your space, though it's worth noting such effects may vary greatly with individual interpretation.

The american Strawberry bush carries a compatible Feng Shui energy with the Southeast-facing direction attributed to its display of vibrant green and red, which resonates with the Wood element in this quadrant. Yet, its implications in Feng Shui shouldn't be taken as absolute, due to the varying interpretations that exist.

Kinnikinnick is considered harmonious when facing Northeast owing to its unique low-growing and evergreen qualities. It channels earthy energy which corresponds to Northeast, a direction associated with earth elements in Feng Shui, aiding balance and stability. However, one's perspective may vary as Feng Shui is ultimately a personal journey.

For the myrtle spurge, eastern exposure can invoke energy flow in spaces due to its assertive and exuberant nature. However, respect its toxicity and bear in mind that Feng Shui is about balance. Too much of this plant may contribute to overstimulation, therefore its placement requires careful consideration.

As per Feng Shui principles, the haworthia pilifera plant holds a remarkable equilibrium with the North-facing direction. It's widely viewed that this plant radiates an energy that compliments the 'Career and Path in Life' area, which resonates with the North. However, these perspectives are purely interpretative and should be considered with a grain of salt.