Grow Mediums Coco 2 ways AK48 & Swiss Cheese

[BayLee420]

Hope I can remember this when the time comes...an excerpt from Ed Rosenthal's Mari Growers Handbook, the section on LIGHT:

METAL HALIDES & ULTRAVIOLET LIGHT (UV)
UV light is composed of spectrums beyond blue that are invisible to ;humans but are visible to many animals. UV light is divided into three bands - UVA, UVB and UVC. UVB is critical to the development of THC. The potency of marijuana is dependant on the amount of UVB light it receives. Metal halides emit UV light and can be used for this purpose.

Even if plants are being grown under HPS lamps, potency - that is THC content - WILL INCREASE SIGNIFICANTLY if they are replaced with metal Halides during the last two weeks of flowering. (My note: HERE'S THE CATCH). Just be aware that the protective glass in air-cooled MH fixtures absorbs UV light before it gets to your garden. So the only way to benefit from the UV output is to REMOVE THE GLASS and take other steps to cool the light.

Looks like I'll be re-installing the window A/C unit in the tent!
Someone, PLEASE REMIND ME TO GIVE THIS A SHOT!

What would be an exceptional increase in THC content 2%--5%---10%???
In my grow space there is no way I could remove the glass. I am using the EYE Hortilux BLUE and Super HPS..They seem to be higher in light predictability even in the UV light..(?).

 

[Bromeo]

You're going to need a Stihl to get through that trunk. Wear safety glasses.

 

[eggmansky]

What would be an exceptional increase in THC content 2%--5%---10%???
In my grow space there is no way I could remove the glass. I am using the EYE Hortilux BLUE and Super HPS..They seem to be higher in light predictability even in the UV light..(?).

https://www.autoflower.org/threads/metal-halide-to-finish.50009

 

[eggmansky]

The reason for the 10 days to 2 weeks with UVB is that the shit harms the plant, but excites the development of terpenoids. With harvest in sight, why not give it a shot?

 

[BayLee420]

It would be too hot in my grow area to set the lamp w/o being cooled. Are you going to try it?
Does Ed say how much of an increase of THC? If it's in the 5% range or 50% range?

 

[eggmansky]

Day 54:

 

[eggmansky]

Just now starting to frost up. The AK48 is showing definite sativa genetics, but the Swiss Cheese seems the perfect hybrid...

 

[eggmansky]

It would be too hot in my grow area to set the lamp w/o being cooled. Are you going to try it?
Does Ed say how much of an increase of THC? If it's in the 5% range or 50% range?

The best I can find is "significant"...
And I've scoured the resources...

 

[eggmansky]

Gonna use the 'reptile' UVB lamps. Will pull the glass if I can control temps. My educated guess is that this is fact. Commonly used by hops growers for uncommonly good beer...

...of cours, we are both aware of my 2nd rate education!

 

[BayLee420]

...of cours, we are both aware of my 2nd rate education!

Don't be so hard on yourself....you seem to know what your doing.

I had a J&W student (on his 2nd year) as a summer helper. I questioned that he even spent a single day in culinary instruction. Had him do a simple chocolate chip cookie production. What a freaking disaster. I spent more time getting him off the cell phone than do a simple project that a High School Home Ec student could do. Now that;s a 2nd rate education. When he said he'd be back next year..I told him over my dead body will you be back here.