Both JoeCrowe and LD50 may want to dig into that.
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See your PM’s for some additional subject matter. Have fun!
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This is where I started back in 2013
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I’ve heard that using chitin and silica sourced from insects can do this
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You will not preserve any terps with this stuff, it acts like a terp replacer.
If you are going to use it, use it early in veg.
It does indeed, but stress comes with a cost, and that cost can be yield.
If you use too much you can end up with nothing but foxtails.
Much like greenspoon.
If that is what you are after, this may be worth your while.
Otherwise, try to use it early in veg.
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You may be interested in this…
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Great info man!! Greatly appreciated. I am on the verge of flipping the switch, so probably too late to utilize this run and I really don’t want to use anything that will replace terps. Thought it would improve them, not replace them, so great to know!
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Think of it like this…
You are spraying perfume on your plants, really it is the same exact shit. 
Plus it makes the plant put out its own jasmonate.
Even when the MJ smell wears off, the plant will mimic that smell.
So the terps start to smell like the perfume aka MeJA.
If you have a plant that has no smell and taste MeJA will improve it by adding some of each.
If you had a nice fruity smelling cultivar, most of the fruit will be lost and replaced by MeJA and it will smell pretty strong.
To me it ruins a good smelling strain/cultivar.
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Great way to put it! I thought it was a Nute the plant would absorb through its root system. Not a fan of sprays!
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Plants use it to signal one another in the case of danger.
When you cut a plants leaves off, it will naturally give off small amounts of MeJA and that will have an effect on other plants in the room too.
See the thread about stress for more info.
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I read the study once over and noticed the following:
Transient change in THCA content about 5%. Forces plant metabolism to convert more CBD into THC. mmm oh yes, no change to trichome morphology, but a large change to the plant itself. If you look at the images, they are about half the size when treated.
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What the fuck!?!? That looks like a whole other plant growing off that stem!
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This one looks pretty good when it comes to addressing the relationship of JA to other plant signaling, seems really complicated to predict response to an exogenous application of MeJA:
fpls-10-01349.pdf (1.6 MB)
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@DavesNotHere talked about making their own JA foliar using KNF OHN tek on fresh jasmine flowers or dried ones rehydrated with flat cheap beer, maybe @BeagleZ or @Wuachuma might be able to comment on that approach, since one of your questions was how to DIY it organically.
My thought on it is that the plant generates endogenous jasmonic acids as a stress response, especially to leaf or stem damage, so topping, aggressive supercropping and other high-stress training techniques along with Day 1-21-42 defoliation in flower are probably generating plenty IMO
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Wanted to update everyone. I had actually ordered some MeJA from PowerGrown before reading all of the replies (I tend to pull the trigger faster than I should……). Well, they also sent me Chitosan with the instructions below. Any thoughts??
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Is it liquid or powder?
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The MeJA is liquid and the Chitosan is powder.
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Very interesting, never saw a powder before.
Does it smell strong?
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Sorry Shag, I clarified my response. The MeJA is liquid. Chitosan is powder. Haven’t opened either yet. Want to get the lay of the land first and then grow two clones (1 using these products and the other not using them) to rest out the ultimate outcome.
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If possible could you note how many ml is equal to 0.382 grams of MeJA.
Also, I would not mix a gallon, maybe a liter at a time or even less, you should not need much for a proper reaction.
FYI
Chitosan get its best reaction when used as a spray.
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