Fastest Plant for a 30-Day School Project: Daylily Bulb Beats Seeds

Seeds take 7–25 days just to germinate. A daylily bulb (or any perennial bulb) has stored energy and will shoot up visibly in days. Plant in a 6-inch pot with potting mix, water, place on a sunny windowsill. No fertilizer needed for 30 days. For height, choose a tall cultivar like 'Hyperion' (40 inches). Measure daily—great science project data.