Plant growth regulators are classified into two classes growth stimulants and growth retardants. Like opiates and opioids. One is an opiate and the other works on the same receptor site but is a different chemical compound. Morphine vs tramadol.
Organic growth regulators (stimulants) include Giberellic acid, auxins, cytokines there are others. There is also a plant growth retardant type hormone found in crustacean shells.
Synthetic pgr we all know about that trash.
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Ok so organic ok anything synthetic void like the plague.
Thanks for you reply