The frequency with which you perceive sunflowers or any other particular object or symbol in your environment is most likely a result of various factors, including your attention, personal interests, and cognitive biases. It is unlikely to be a sign from the universe in a metaphysical or supernatural sense.
Our brains are adept at recognizing patterns and making associations. When we develop an interest in something or are consciously aware of it, we tend to notice it more frequently. This phenomenon is known as selective attention. If you have a fascination or appreciation for sunflowers, it is natural for your brain to prioritize detecting and recognizing sunflowers whenever they appear in your surroundings. This could make you more attuned to spotting them, whether they are actual sunflowers in nature, images of sunflowers, or even representations of sunflowers in artwork or media.
Cognitive biases, such as confirmation bias or frequency illusion (also known as the Baader-Meinhof phenomenon), can also contribute to the perception of increased occurrences of sunflowers. Confirmation bias is the tendency to seek or interpret information in a way that confirms one's preexisting beliefs or expectations. When you develop an interest in sunflowers or interpret them as a meaningful symbol, you might notice instances of sunflowers more readily, while disregarding or not remembering instances where they are absent.
While it is enjoyable to find personal meaning or symbolism in objects or occurrences, it is important to approach such interpretations with a critical and rational mindset. The perception of sunflowers in your daily life is more likely a reflection of your attention, interests, and cognitive processes rather than a cosmic sign or message from the universe.