http://steephilllab.com/thcv-update-dougs-varin-strain/
any info appreciated 
Lab reports?
THCv is an interesting cannabinoid. I never grew Doug’s Varin, but Willie Nelson is really high in THCv. Willie Nelson is a cross between Nepales and Viet Nam Black. Viet Nam black is the main contributor to Willie’s being high in THCv, as it is also very high in THCv. Durban Poison is also high in THCv, which gives it that wake and bake effect.THCv weed is also sneaker weed. The THCv masks the effects of THC for about a half hour. Then it lets go and its hammer time.
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Check out this info bro. . .not really on topic but it’s a great read
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I cultivate Doug’s Varin exclusively. I can tell you just about anything you ever wanted to know about.
side note: I hypothesize that I may have consumed more THCV than any other person on the face of the earth. So ama about that too lol.
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Thanks for stopping by. Can you say who created it, when & what it’s lineage(genetics) is? Very curious.
Have you tried it in combination with other varieties/strains to “calibrate” your desired effect?
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Doug is a breeder who is in his mid-seventies, and he found the strain by cross breeding a bunch of alleged harlequin seeds he bought from Europe. I doubt he’d want me to share his last name.
I make some pretty high THCV concentrates (anywhere from 10-60 percent), and I’ve mixed it with a lot of different Cannabinoids. CBD is nice. CBG does something when it’s with THCV in high amounts too. I generally don’t really
Smoke the flowers because they really don’t have any bag appeal.
It’s 100% an upper in a way that’s pretty different from straight THC, but is certainly exacerbated by THC, or perhaps it is the THC that is exacerbated by the THCV.
I’ll post pictures of the plants in various stages of growth when I get back to my desktop computer.
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The article appears to be a press release. The use of kief instead of buds for the test has me wondering what the hash yield would be.
@dlampach
Do you have one cut, or are there multiple phenos in your stable?
Are these genetics available anywhere, today?
What is the usual hash yield of the trim? Of the buds?
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Multiple Phenos, ranging from 6-8% THCVA
I was CEO of Steep Hill way back when that Kief was tested. Also when that article was posted.
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Approx 35 grams of an oil that’s 26/35 thcv to thc. Per pound co2 supercritical.
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Well, now. 
I had a sense from your post you might not be full of the proverbial. 
heheh. Thanks for sharing with us.
There is a Medical Club thread in case you are interested.
My personal interest in the subject comes from personal experience with some meds i was getting a few years ago from a dispensary. The herb in question was claimed to be Durban Poison but really looked like a hybrid or even a kush variant. That aside, the effect was night-and-day different(better) for my particular need-- i have an old tailbone injury and related nerve damage, several other heal problems, including PTSD. Somewhere i read that the Durban had become known as popular amongst both types/groups, and in this case I was a definite fan.
Step forward a bit, I drove for 6 hours to get a DurbanPoison clone from Sonoma Co., the flowers are an orangey rubbery phenotype, and it flowers true to the promised 11-12 weeks. Difficult for me having only a couple of years experience, but I’ve carried it a couple years and am retiring it. I did chuck some BOG SourLifeSaver pollen on a branch, so not a total waste.
That plant’s effect was distinct but similar to the dispensary stuff, mine being FAR more energetic with only very high amounts leading to any sleep(probably from all the yardwork-ha!).
After all this, and now this new to me Varin, I have to wonder if, for medical purposes, should breeding be a priority or maybe a parallel to combining the strains that stand out(i.e. Doug’s Varin), “blending” so to speak, to dial in a more targeted effect? It sounds like that may well be what you are doing. 
It’s 1am, i’m baked, moved 2 yards of vermicompost in the dark, but thanks again for the info, & for joining us here on OverGrow. 
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Not sure if this guy is one of the people who already replied to the thread, but if you’re looking for more info about THCV, THCVhunter on IG has gleaned a bit in his travels:
He was a fairly frequent poster on the now-defunct https://BreedBay.co.uk, and he seemed to have some knowledge of the subject.
I’m fairly interested as well. I don’t know that I’ve ever had a high THCV variety, but I’d sure love to try one.
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Many strains are rather high in THCv. I am doing several breeding projects with high THCv strains, including 4 different Durban Poison strains, landrace Vietnamese Black, Jack the Ripper, and Power Plant. THCv has contradicting effects. It acts as a CB1 receptor agonist like THC does in higher doses. In lower doses, it acts as a CB1 antagonist which dulls the high. Which may account for the delayed effects of smoking smoking high THCv strains, or the so called ‘sneaker weed’ effect.
Fairly high THCv strains include:
Pineapple Purps
Vietnamese Black (a landrace)
Willie’s Nelson
Doug’s Varin (short for Tetrahydrocannabivarin)
High THCv strains include:
Durban Poison
Power Plant
Jack the Ripper
Other notable strains with variable levels of THCv include:
Skunk No.1
Dutch Treat
Mexican landraces
GSC
Tangie
Supposedly Steep Hill has done the most research on THCv, but published information is rather scant. As the DEA has deemed Cannabis to have “no medicinal value” and Cannabis is defined as a Schedule 1 narcotic, research is very limited on the cannabinoids (and terpenes/terpenoids) in the USA. Sadly. I read someplace where David Watson said that he has smoked a lot of THCv, and he said that there was no high to it at all by itself. Which would make it like CBD. No high on their own, but mixed with THC, the results vary greatly with them.
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well im glad i opened this thread and read along
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Saw a mini Strain Hunter video about Franco and Arjan in Congo. They bribed their way into getting seeds of a strain there. They grew it in Amsterdam and it had the highest THCv level that they have ever tested.
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Cool stuff! I’ve heard it suggested that increased UV light will drastically increase thcv production. I remember people on old OG adding reptile or fish tank UV bulbs to their rooms.
Anyone have any experience with that?
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If you mention Arjan please mention how he trades feminized seed for new strains thus destroying the rural farmer’s life. Isn’t that just great? Arjan profits on the poor. What a great guy! Helping the world pay his pocket.
Here is a webpage with some strains and their THC-V values.
https://www.potbotics.com/learn/strains
My Bubblegum comes out pretty impressively.
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I do. I use a reptile bulb in my tent. I used 2 last grow. I saw strong trichome growth, bit you need them high up or you’ll end up cooking the trichs off. Minimum 24" from the canopy if you grab a 50w one. The heat the generate is sunburn level until about 20" or so. I use a reflector and heat lamp for mine. It’ll produce more THCV if it’s already making a decent amount. Otherwise it just makes more trichomes form as a defense. Can’t do it to strong or you end up doing more harm than good.
Currently my last one I have left is about 4 feet above the canopy. Probably too high this time. There’s a balance
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Nice. Is there a noticeable difference as far as yield, taste or potency?
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I haven’t grown without, but I did notice a smell change in the plants as I changed the intensity of UV light. UVA over UVB if you need to choose 1. A makes the hormone change you want. B does a little, but it’s what makes you burn
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I’ve linked to the article in the past.
If you get the balance right it’ll be similar to having UV in the LEDs, but without burning them out as fast since they won’t get as hot. You just separate the UV light from the rest and raise it as needed.
It’ll promote stretching too. If you mix with IR you’ll see strong veg growth once you nail the intensity The plants want
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