I've never heard of colchicine raising the THC of plants except in the terms of attempting to do so by inducing polyploidy. Do you have a reference link or something I could read about this? The Dr. Frankenstein part of me finds this very interesting. /s
"Tetraploid clones were assessed for changes in morphology and chemical profile compared to diploid control plants. Tetraploid fan leaves were larger, with stomata about 30% larger and about half as dense compared to diploids. Trichome density was increased by about 40% on tetraploid sugar leaves, coupled with significant changes in the terpene profile and a 9% increase in CBD that was significant in buds.
No significant increase in yield of dried bud or THC content was observed. (Emphasis provided) "
Cannabis sativa L. is a diploid species, cultivated throughout the ages as a source of fiber, food, and secondary metabolites with therapeutic and recreation...
www.frontiersin.org
ALTERNATIVELY STATED:
"
Polyploid cannabis seeds. The biggest new development since feminized cannabis seeds?
Polyploid cannabis seeds represent a completely new approach to cannabis growing. Several years of laboratory work would be required to create, stabilise and assess the polyploid results. There are several
advantages and disadvantages to polyploidy in plants. One of the main reasons why there is such huge interest in creating polyploid cannabis is to increase plant vigor (heterosis). This could improve yields and potency of the cannabis crops. The extra set (or sets) of cannabis chromosomes may allow for different growth rates and higher cannabinoid content. These days, cannabis is a multi $billion crop with huge recreational and medical markets. Any methods to further improve potency and yields are of serious interest. Those with most to gain are probably the largest commercial cannabis growers, where even small improvements to potency and yield can add $millions to revenue. If polyploid cannabis seeds can be produced at affordable prices they would also be of real interest to cannabis home growers. Most home growers only buy a few cannabis seeds each year and tend to focus on getting the highest yields and highest potency from the minimum number of plants. So polyploid cannabis seeds will be just as appealing to home growers as they would be to legal licensed producers."
Read on to find out more about polyploid cannabis. Polyploid cannabis is being researched to see if it can improve yield or potency of the final harvest.
dutch-passion.com
Given that the former is a scientific white paper and the latter essentially an "ad", albeit from what is likely one of the better sourced of that sort, I'd tend to give more credence accordingly. I'm not sure if the white paper referencing tetraploid specimens only has anything to do with it vs. other forms of polyploidy, but it wouldn't seem likely, to me anyway.