Radishes are small and grow fast, I think they hit full maturity in like 24 days.. that way in 2 weeks, you could pull them and easily compare sizes. it's pretty well known that you can take crushed up asprin and add it to a vase to perk up wilted flowers like roses that are about to die, it's not the drug that does it fyi, it's the caffine.. you might try other sources of caffine and see what kind of different effects you get.
sunflower
alfalfa sprouts
I am doing a science project to see if the aspirin water vs plain water can effect the growth on a plant.
Do anyone know a quick and easy plant from seed that will grow under 2weeks?
Please give a name of the flower/plant and how long will it take to grow