Science Fair: Can Dyed Water Color Grass Blades?

Short Answer: No

Grass color comes from chlorophyll (green pigment) produced via photosynthesis. Light absorption/refraction by chlorophyll makes grass appear green. Dyes in water don't change this.

Why Cut Flowers Work Differently

Cut stems (carnations, celery) absorb dyed water via xylem, transporting color to petals/leaves. But grass blades are photosynthetic organs—they produce their own pigment. Root uptake of dye doesn't override chlorophyll synthesis.

Resources for Your Project

• RIT Center for Imaging Science FAQ: cis.rit.edu/mcsl/outreach/faq.php?catnum=0
• WebExhibits Causes of Color: webexhibits.org/causesofcolor/7.html

Better Science Fair Angle

Test how *nutrient deficiencies* (iron, nitrogen) affect chlorophyll and grass color. Or compare organic vs. synthetic fertilizer effects on chlorophyll density (measurable with a chlorophyll meter).