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A common classification of two types of cannabis in which we call plants that produce narrow or broad leaves and assign effects based on it. The fact of the matter is, when the taxonomy was being written in 1753, Carl Linnaeus was essentially aware of only one type of cannabis: the European Hemp variety (Cannabis sativa).

In 1785, Jean-Baptiste Lamarck published a description of a second species of Cannabis, which he named Cannabis indica. 

I wrote an article for Grow Magazine that I think is important to everybody growing. it talks about vapor pressure deficit (VPD) and how important it is to maintaining a healthy garden.

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