Describing a specific scent resulting from combining aromas can be a subjective and imaginative exercise, as scents are complex and often unique to individuals. However, I can attempt to create a poetic and evocative description based on the elements you've provided:
The air is filled with a symphony of captivating scents. At first, the warm embrace of a freshly baked croissant envelops your senses, its buttery notes wafting through the air like a gentle caress. The delicate fragrance of a blooming gardenia follows, its white petals exuding a sweet and heady floral bouquet, weaving harmoniously with the comforting aroma of the croissant.
As you immerse yourself in this olfactory wonderland, a distant thunderstorm graces the horizon. The anticipation of rain brings an earthy petrichor, mingling with the croissant and gardenia scents, grounding the composition with a touch of nature's raw power.
In this unique olfactory fusion, the crisp and airy essence of the croissant dances with the intoxicating floral sweetness of the gardenia, while the distant rumble of thunder adds an underlying intrigue. The result is a scent that is both inviting and mysterious, evoking a sense of comfort, elegance, and the untamed beauty of nature.
Remember that scent descriptions are highly personal and can evoke different emotions and memories for each individual. The combination you described is whimsical and poetic, and the actual interpretation of the scent might differ depending on one's own experiences and perceptions.