did you know that cannabis can stand  extreme temperature condition? the lower the temp is, the growing rate of cannabis will  slow down to extremely slow and vice versa to the hi T.   this plant is indigenous to Africa. So, of course it prefers to be in 15C/75F or so.  I did not say that the plant grow in the neg T. What I meant to say is that the plant could withstand extreme T condition and I said it could grow in 0 degree  if you induce the plant with chem or other plants’  properties.  There is a group of prof and PhD who are working on cannabis and marijuana next to my lab.   Because I am also working on  the same dept with them and sometimes we exchange info w/ each other and this is how i find out.

As a matter of fact, we are looking for other mechanisms from addictive drugs like Met/Cannabis so that we can reduce their addictive properties  on human.  People often get addictive for a prolong use of this drug (med use is what i meant to say here).  We don’t want future med users will face the same consequence.  Plus, the drug is very useful in controlling pain and other med applications.  It would be a big waste if we could not use it in med field.  
  Who says that there is no plant can grow in the zero or negative T?   I suggest whoever tells you so, need to do more research.  

I mean you have your BA in biology? This does not make sense because  BA = Bachelor of Arts. how can an art major person understand about drugs and their chemical? Even a PhD student like me is still learning to understand matters surrounding life.  Nothing can be confirm .  The more you study, the less that you know and to the point that you thought that you already found the answer, but then someone out there found a different answers and you have to start over or build from what you know.  

I am not trying to demote your degree or knowledge or anything because I am not even better of myself.  There are a lot of things for me to learn from and I appreciate your inputs and thoughts on subject matters.