how to up thc and other characteristics ?

[silasraven]

was wondering how to up the level of thc in oone strain? no going outside the genetics to get it.

 

[Kite High]

UVB 400uw/cm2. Low rh. Intense lighting and more blue light. Increased sulfur in flower cycle.

If in reference to breeding then sellection of the most potent crossed back to the parent and repeAt until progeny improve over parents.

 

[UncleBuck]

growing cannabis usually ups the THC.

 

[legallyflying]

Has there been any studies or people getting the same strain tested after using UV?

The best way to get more potent strain is to seek it out.

 

[Kite High]

Has there been any studies or people getting the same strain tested after using UV?

The best way to get more potent strain is to seek it out.

Ok, yes here you go
Same mother
Clones for each grow

non-uvb results
http://library.constantcontact.com/download/get/file/1102675987015-267/NM_BD16_12_28_12.pdf

uvb results
http://library.constantcontact.com/download/get/file/1102675987015-283/NM_BD17_2_7_13.pdf

same growth chamber all temps and rh maintained the same as was feed schedule and strength only difference was the addition of 12% arcadia T5 ho 54 watts in place of blue actinic 450 nm peak tubes

 

[MajorCoco]

As mentioned, UV seems to have an impact, as does harsh water conditions (strain dependent), however the increases in THC content seem to me to be marginal. Genetics is singularly the most important factor for potency. In-breeding and phenome selection is the way to improve genetics without going outside the pool.

 

[maryjaneslave]

stress training can work, last session i hade a main branch break halfway, it recoverd and with the flowering nutes it turned the leafs half purple, the plant diverted the nutes to wear it really needed it. but to get the most thc, dont fuck up ur plants, its all in its genes

 

[Trousers]

Being an excellent grower is the best way to improve thc.

I got a purple erkle clone (I needed a quick finisher before vacation. It finished in 51 days, no problem) and a sample of the dispensary's purple erkle.

The dispensary's PE was not nearly as good as mine turned out. Maybe they have a shitty cure, or do not really know how to grow, but mine was leaps and bounds better than theirs.

I'm not saying I am an excellent grower, but I am better than some "professionals."

 

[Impman]

Ok, yes here you go
Same mother
Clones for each grow

non-uvb results
http://library.constantcontact.com/download/get/file/1102675987015-267/NM_BD16_12_28_12.pdf

uvb results
http://library.constantcontact.com/download/get/file/1102675987015-283/NM_BD17_2_7_13.pdf

same growth chamber all temps and rh maintained the same as was feed schedule and strength only difference was the addition of 12% arcadia T5 ho 54 watts in place of blue actinic 450 nm peak tubes

EVERY HPS bulb gives off UVB. Where the hell did they even get a non UVB bulb? That test is whack. They need to study different brands of bulbs. A HPS Eye Hortilux has more than enough Blue and Red , UVB, to give you max THC potency as do many/most HPS bulbs.

 

[Kite High]

EVERY HPS bulb gives off UVB. Where the hell did they even get a non UVB bulb? That test is whack. They need to study different brands of bulbs. A HPS Eye Hortilux has more than enough Blue and Red , UVB, to give you max THC potency as do many/most HPS bulbs.

Apologies but my UVB meter shows no usable amounts of UVB emitted due to the glass of the outer envelope of all the numerous lamps I have tested, eye hortilux included. There is no single lamp that has it all covered spectrum wise. Cmh comes close but still no useful amount of UVB.

The glass formulation must include enough quartz to allow UVB as it is ILLEGAL according to Federal Law for these lamps to emit UVB to protect our eyes and skin. All horticultural bulbs are indeed used around humans so no HIDs have the correct and more costly glass formulations. Therefore the only lamps that do emit UVB in high enough amounts to cause effect to the synthase proteins are a couple of brands of reptile bulbs Arcadia and Megaray.

Stop believing manufacturer hype and get yourself some meters. You will see they all lie. Your attack on the results are full of fallacy. To be expected as you are not knowledgeable in this area. I have researched and tested these things with meters and lab results so I do know and am sharing. Those are my test results.

 

[Pepe le skunk]

Kite is right on about hps not having uvb. All I can say is the buds exposed to uvb from week 3 of flower to harvest are fantasticly potent.

Not having PM, mites or thrips in flower is a good way to have better quality. Lots of light and good air flow also helps alot.

 

[brimck325]

great info kite!

 

[Uncle Ben]

was wondering how to up the level of thc in oone strain? no going outside the genetics to get it.

Unless you can measure and confirm the differences using lab equipment/analysis, why would you bother? Anecdotal evidence doesn't mean squat and it's human nature to see what we want or expect to see.

UB

 

[Mad Hamish]

Apologies but my UVB meter shows no usable amounts of UVB emitted due to the glass of the outer envelope of all the numerous lamps I have tested, eye hortilux included. There is no single lamp that has it all covered spectrum wise. Cmh comes close but still no useful amount of UVB.

The glass formulation must include enough quartz to allow UVB as it is ILLEGAL according to Federal Law for these lamps to emit UVB to protect our eyes and skin. All horticultural bulbs are indeed used around humans so no HIDs have the correct and more costly glass formulations. Therefore the only lamps that do emit UVB in high enough amounts to cause effect to the synthase proteins are a couple of brands of reptile bulbs Arcadia and Megaray.

Stop believing manufacturer hype and get yourself some meters. You will see they all lie. Your attack on the results are full of fallacy. To be expected as you are not knowledgeable in this area. I have researched and tested these things with meters and lab results so I do know and am sharing. Those are my test results.

OK I've looked them up, I can find little 13-watt UVB lamps meant for reptiles over here. So, if I want to supplement A- one 400 watt MH for mums and B- 2 600w HPS fixtures, how would you suggest I go about it? Any idea of how many per square meter I'd need? Any idea of safe distance?

I'm super-curious...

 

[Mad Hamish]

Unless you can measure and confirm the differences using lab equipment/analysis, why would you bother? Anecdotal evidence doesn't mean squat and it's human nature to see what we want or expect to see.

UB

Nothing wrong with being curious. And it so happens that somebody that DOES have the ability to measure with lab results popped by with an answer. Because wanting to do the best you can is fucking AWESOME.

 

[Uncle Ben]

Ok, yes here you go
Same mother
Clones for each grow

non-uvb results
http://library.constantcontact.com/download/get/file/1102675987015-267/NM_BD16_12_28_12.pdf

uvb results
http://library.constantcontact.com/download/get/file/1102675987015-283/NM_BD17_2_7_13.pdf

same growth chamber all temps and rh maintained the same as was feed schedule and strength only difference was the addition of 12% arcadia T5 ho 54 watts in place of blue actinic 450 nm peak tubes

^ That's what I'm talkin' bout!

 

[Kite High]

OK I've looked them up, I can find little 13-watt UVB lamps meant for reptiles over here. So, if I want to supplement A- one 400 watt MH for mums and B- 2 600w HPS fixtures, how would you suggest I go about it? Any idea of how many per square meter I'd need? Any idea of safe distance?

I'm super-curious...

Well not to disappoint you but rather to keep you from wasting time and energy none of the cfls I have tested, which were many at quite the cost, emit enough UVB to effect the causation we seek. It takes 150-400 uw/cm2. Over 400 yield reduction occurs with no additional benefit. The cfls tested from 13 - 65 watts the best output at 4 inches was 85 uw/cm2.

These are the only affordable fluorescent tubes that emit enough and it is at 12-18 inches from the tubes.
http://www.lightyourreptiles.com/ard3t546in54.html

 

[Pepe le skunk]

Here is a good example of a way it could be done. 4 Zoo med 10% UVB 40 watt and 2 95 watt 7% UVB bulbs. Rotating the crop for even exposure is important. So all sides receive light during flowering when trich's are building the most. This is supplemental to 3 600's hps and a 1K MH Blue enhanced Hortilux bare bulb in center. Hope to get the 12% bulbs but this worked well for now...
Hope that helps.

 

[legallyflying]

Has anyone ever used the mega ray? Awhile back when I was interested in UV I was looking at one and try we're all sold out. They also stated that you needed to call and ask permission to order it...should only be used by proffesionals.

I do reca however a very respected grower on this forum tried a bunch of different bulbs, combos, etc and basically said that given the amount needed, the flouro tubes were not worth it.

 

[Mad Hamish]

Well not to disappoint you but rather to keep you from wasting time and energy none of the cfls I have tested, which were many at quite the cost, emit enough UVB to effect the causation we seek. It takes 150-400 uw/cm2. Over 400 yield reduction occurs with no additional benefit. The cfls tested from 13 - 65 watts the best output at 4 inches was 85 uw/cm2.

These are the only affordable fluorescent tubes that emit enough and it is at 12-18 inches from the tubes.
http://www.lightyourreptiles.com/ard3t546in54.html

Thanks for that! Yeah unfortunately for me I'll have to import as per usual with most things NICE. Definitely going onto my 'want' list...