Your Grandpa's Weed or is UV supplementation really needed?

[NewI]

I thought increased frost which I had long ago from Mastercolor cmh retrofits may have been from UV but I got the same effect under blurple but very tiny buds. I know that cmh emitted UV from several welder flash incidents. I also know the LEDs had none.

Now in a year of flowering with cobs, same strains have more frost than ever, and no UV. I have a suspicion that the plants react to increased deep blues because in millions of years of adaptations, when these deep blues are intense, the slightly shorter UV wavelengths are also present at harmful levels. If so, increased blues would signal the plant to take defensive action.

Just thinkin' at 6:21 AM.

RM states that UV gives the trics a different profile (potency), witch it is logical.

 

[MichiganMedGrower]

University of Utah has published much data on exact plant processes for individual light frequencies. It is all out there to read. There is no mystery. Uv was responsible for a 4% increase in total cannabanoids and added blue light up to 50% to red showed increased health, vigor and cannabanoid content as well. It was previously thought that 1 third to 2 thirds blue light was the best gain but that test did not include marijuana at the University of Michigan.

 

[RM3]

 

[MichiganMedGrower]

Data is repeatable. Your opinion is just an opinion.

 

[NewI]

Would to much blue stress the plant? H

University of Utah has published much data on exact plant processes for individual light frequencies. It is all out there to read. There is no mystery. Uv was responsible for a 4% increase in total cannabanoids and added blue light up to 50% to red showed increased health, vigor and cannabanoid content as well. It was previously thought that 1 third to 2 thirds blue light was the best gain but that test did not include marijuana at the University of Michigan.

Can you link that page? I would bever get there on my own lol

 

[Grandpapy]

Data is repeatable. Your opinion is just an opinion.

You must of missed the part where he said he tried HID'S a few times, and did not do well in his "environment".

I'd love to run without a scrubber.

 

[ttystikk]

Also wanted to mention that early trich's is strain dependent. I had several Sour Sunset's (GSC dominant) throw early trichs under an old 20w aquarium bulb.

Same plant, earlier.

You do know most aquarium bulbs have UV, right?

 

[MichiganMedGrower]

You must of missed the part where he said he tried HID'S a few times, and did not do well in his "environment".

I'd love to run without a scrubber.

I think he just never got good with HPS. It's easier to grow under t-5's. I didn't miss anything. I just spent months reading his "books".

 

[ttystikk]

I thought increased frost which I had long ago from Mastercolor cmh retrofits may have been from UV but I got the same effect under blurple but very tiny buds. I know that cmh emitted UV from several welder flash incidents. I also know the LEDs had none.

Now in a year of flowering with cobs, same strains have more frost than ever, and no UV. I have a suspicion that the plants react to increased deep blues because in millions of years of adaptations, when these deep blues are intense, the slightly shorter UV wavelengths are also present at harmful levels. If so, increased blues would signal the plant to take defensive action.

Just thinkin' at 6:21 AM.

I like this line of thinking, seems to fit the facts pretty well.

Part of my results with COB LED are due to more light intensity. Same watts, double the output.

 

[RM3]

You must of missed the part where he said he tried HID'S a few times, and did not do well in his "environment".

I'd love to run without a scrubber.

I ran CMH for several years before switching to T5's
it's well documented here

 

[RM3]

I think he just never got good with HPS. It's easier to grow under t-5's. I didn't miss anything. I just spent months reading his "books".

I have never, nor will I ever use an HPS light

 

[hillbill]

My pot's too strong and I'm afraid of my hash! So I very well could be over associating potency with trich production without accounting for variables within each trich. That seems interesting.

I may have to get a couple lizard lights. How close do these have to be and coverage?

 

[MichiganMedGrower]

Would to much blue stress the plant? H

Can you link that page? I would bever get there on my own lol

I wish. But I was linked to it from a thread in RM3's website. I am not a member now and have deleted my bookmarks through his site as they don't work anymore.

Funny thing is. The research does not suggest doing more of any of it than stated above can help as Rm3 suggests. More is not always better.

There is tons of specific light info in Ed Rosenthal Growers Handbook as well. It suggests all the same info even 20 years ago. Easy search for the free PDF. Just no color glossy images like in the book.

I am sorry I don't have the file you need saved. I took this all very seriously but found better growing in a stable environment with great genetics will likely show much higher gains than just adding light bulbs. Although more light is more yield and potency to a point of you can manage it.

In the last 3 months while I researched all of this I changed nothing in my garden. I do strive to do better each time I do things and from planting a seed and harvesting a plant almost every week and caring for them individually (gallon nute solution custom mixed per plant each time) I am still seeing gains in yield and potency. Proper timed stress free transplanting up for a fully developed rootball seems the most important thing for plant vigor and health. Which ultimately determines the results.

Maybe when I can't learn to grow better anymore (which would never happen as we can always learn to do better) then a new light or additive with a tiny percentage of gain could be realized. The gains my garden realized in the last 90 days is more like 15% just in yield. And the higher potency is subjective but everybody noticed.

Just learn to grow better with what we already have first is my motto. Small improvements can mean huge gains. Focus on a proper stable environment.

 

[MichiganMedGrower]

I have never, nor will I ever use an HPS light

Sorry. I meant to write HID. Metal Halide.

 

[MichiganMedGrower]

I have never, nor will I ever use an HPS light

Haven't seen your due public apology for breaking the cardinal rule as a forum administrator.

 

[Tyleb173rd]

So I could strap 2 bulb, 4ft fixtures in between each 4 COB light bar, with a Pure UV Agromax and 6400k in each fixture?

4x4 frame


O O O O
O l O l O l O
O l O l O l O
O O O O

Yay, or nay?

Edit.....my poor illustration of my light is giving me trouble. It's 16 COB in a 4x4 frame.

 

[RM3]

Haven't seen your due public apology for breaking the cardinal rule as a forum administrator.

 

[RM3]

So I could strap 2 bulb, 4ft fixtures in between each 4 COB light bar, with a Pure UV Agromax and 6400k in each fixture?

4x4 frame


O O O O
O l O l O l O
O l O l O l O
O O O O

Yay, or nay?

Edit.....my poor illustration of my light is giving me trouble. It's 16 COB in a 4x4 frame.

You could but they would need to be run on a separate timer and for small burst 3 to 5 min each hour, adjusted to your garden via plant response

 

[NewI]

What would to much UV do to cana plants? "To much" can be whatever

 

[RM3]

What would to much UV do to cana plants? "To much" can be whatever

10 straight hours with the pure UVB bulb 3 feet away