Science Project: Vitamin Effects on Plants—Minerals Matter More

Plants Need Minerals, Not Vitamins

I'm not a research scientist, but: plants don't use vitamins for growth—they synthesize their own. What they need are minerals: NPK (nitrogen, phosphorus, potassium). Flowering plants need more P; grass needs more N; fruit trees need more K and P. Vitamins are products of plant metabolism, not inputs. For your project, test mineral deficiencies (N, P, K, Ca, Mg, Fe) on a fast-growing plant like radish or lettuce—measurable results in weeks.