oldessecommentedweek 19 years ago
You have enough material to make more control groups and more interesting and useful experiment. The most cheep thing that comes to mind is Valagro stimulants in small containers (spray or pour 5 plants, and then fix the reaction).
It would be interesting to see:
Valagro: Set , Megafol, Radifarm, Cream, Extra, Viva, Actiwave
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