in summation:

Mescaline concentration in the old growth (of peyote) was close to 4%, and in new growth was close to 2%.

I wonder how long it would take for the new growth to reach the same level as the older...?

Brilliant!

Are there plans to extend this analysis in peyotes growing under different paremeters? I am thinking about grafted vs non-grafted or young peyotes vs older ones?

Thanks for sharing. Really interesting research.

Sorry to have removed this PDF but there was some confusion about my permission to post it.
I'll repost it as soon as I've clarified that question.


Factors influencing growth should be studied in more detail but remain understudied. Its surprisingly easy for any individual to create a well designed study with just a bit of thought and planning.
Increased biomass and water appears to be adversely impactful on alkaloid content.
In general nitrates tend to favor vegetative growth and ammonium favors increased alkaloids but this area is still wide open and wanting workers.
Periods of drought seems to be crucial for growing good plants.
The only published study I'm aware of comparatively concerning grafted peyote plants (Siniscalco -- also available online) showed them to be vastly weaker than peyote starved for water but a bit better than the plants kept "well irrigated". Whether waiting until they are older would resolve that has not been studied as far as I'm aware.