Phyllotaxis, or the arrangement of leaves around a plant's stem, has marveled scientists and mathematicians for centuries. The leaves of most plants form very precise spirals, and the number of spirals visible in a plant belongs to the Fibonacci sequence. Furthermore, the difference in angular positions of successive leaves, called the divergence angle (DA), is constant, and it approaches the Golden Angle (approximately 137.5°). The plant hormone auxin controls phyllotactic patterns by accumulating in certain regions of the plant's meristem, which triggers the growth of a new primordia. I set up four experimental groups and one control group; each experimental group received different levels of 2,4-D every other day, and the control group didn't receive any 2,4-D. The divergence angle of the first three leaves was measured and recorded every other day. Leaves 1 and 2 generated the divergence angle predicted by the Fibonacci model, and the various experimental groups did not present statistically significant differences; however, the DA of leaves 2 and 3 was greater in the experimental groups that received large amounts of 2,4-D. The average DA of the control group was approximately 70°, and the DA increased by about 5° is every subsequent experimental group until Experimental Group #3, which had the most added 2,4-D and had an average DA of leaves 2 and 3 of approximately 95°. My results show that Fibonacci phyllotactic patterns emerge at later stages of a plant's development.