Allelopathy

[ZafarS]

I have this project I'm doing for myself, not for school, no homework guys, and this is my first post. I just want to get your input:

Can anyone of you guys think of good experiments to test the effect on allelopathy on the growth of other plants (in water)? As you can see, this is not original so I'm not taking credit for you guys' idea, I just want to know what would be good so I can get better at this myself when it DOES matter in the future. Thank you!

[JackBean]

You can either put two plants close to each other or have one plant and add chemicals in some distance and just see, how is the affected plant doing in comparison with same but untreated plant.