How a growing tip packs in new seeds
A seed head does not build its spirals one by one. New florets—the tiny flowers that may later become seeds—form near the center of a growing tip, then move outward as newer ones appear. Each new floret is placed at a slight turn from the one before it. That steady growth leaves older florets farther from the center and creates the visible pattern.
Why neighboring spiral counts appear
When the turn between successive florets is close to a “golden angle,” about 137.5 degrees, each new one tends to land in an open gap rather than directly behind an older one. This spreads florets fairly evenly across the head. The exact angle need not be perfect: the pattern emerges from repeated placement as the tip grows.
To see the spirals, follow rows of florets diagonally around the head. Some curve clockwise, others counterclockwise. Their counts often differ by one step in the Fibonacci sequence—such as 34 and 55—because this kind of regular placement produces spiral families whose counts commonly fall near those numbers. The plant is not adding the two counts; the sequence is a mathematical fingerprint of its growth geometry.
A pattern, not a blueprint
The outcome depends on how a particular seed head grows, and real plants vary. Spiral counts can differ, and not every head displays a neat Fibonacci pair. Still, the pattern shows how a simple local process—placing each new floret in the next available space—can organize thousands of individual growth events into an orderly whole.
