Bridgelux EB-series on a 2' x 4' SCROG

Let 'em die! Imagine the colours in autumn... in the end your plants should look equaly. I like it when there is no more green in the leafs when I harvest. Making the smoke so smooth...mhhh. But thats personal preference!

I guess she had a little bit too less nitrogen in the end (maybe she was a hearty eater), bur it's nothing you can change now in my opinion. As far she the buds are not yellowing/drying before harvest, and only the leafs are effected, I would enjoy the colours!

Take away the brown/dry leafs to prevent rot.

That's light burn. Looks like N deficiency but its not, N problems always start at the bottom and work upwarda as N is depleted.

graying.geek said:

So when the lights came on last night at 22:30 it became clear that a problem is developing in one of the 4 plants. I took the photo this AM after they started their dark cycle, so sorry about the poor photo quality, but note the yellowing of the leaf margins to the midrib area where it remains green. The girls should have everything they need, but looks like a deficiency or perhaps overdose? Anyone?View attachment 3977343

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Serva said:

Let 'em die! Imagine the colours in autumn... in the end your plants should look equaly. I like it when there is no more green in the leafs when I harvest. Making the smoke so smooth...mhhh. But thats personal preference!

I guess she had a little bit too less nitrogen in the end (maybe she was a hearty eater), bur it's nothing you can change now in my opinion. As far she the buds are not yellowing/drying before harvest, and only the leafs are effected, I would enjoy the colours!

Take away the brown/dry leafs to prevent rot.

Click to expand...

Thanx, Serva. Of course, you're right; I probably only have 2 weeks left so there's not much to do anyway. If I recall correctly, during late bloom on my first grow the leave yellowed and died from the bottom up, so the yellowing of the bud leaves caused me to panic, but as you say, they're dying soon anyway. I'll have to keep a closer watch on nutes next time. In retrospect, that particular plant is in the back corner of the scorg so didn't get as much attention as the others.

pop22 said:

That's light burn. Looks like N deficiency but its not, N problems always start at the bottom and work upwarda as N is depleted.

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Thanx, Pop.

I see 2 types of yellowing on the bud leaves: The ones that are all yellow have been that way since I light-burned them a couple of weeks ago. The ones that got my attention last evening are the ones that can be clearly seen top-middle-right, looking like they have a green stripe going down the midrib. You think this is all light burn?

BTW, the photo of your burple grow is impressive for a Noob like me. Looks like a sativa strain? What'd you net from that bad girl?

Mid plant could be a micro nutrient deficit, but IMO, its still light burn. A dose of some micros wouldn't hurt, this late use pretty much any micro, even bottled its not going to affect the buds.

The plant was Royal Queen's Shining Siler Haze. Being a pure Sativa the buds are fluffy, still, I got 250 grams dry from her! If you like a Sativa high, she has a kickass one! I'm sure with a COB light, like the quantum board light I built, she would have been way over a pound.

graying.geek said:

Thanx, Pop.

I see 2 types of yellowing on the bud leaves: The ones that are all yellow have been that way since I light-burned them a couple of weeks ago. The ones that got my attention last evening are the ones that can be clearly seen top-middle-right, looking like they have a green stripe going down the midrib. You think this is all light burn?

BTW, the photo of your burple grow is impressive for a Noob like me. Looks like a sativa strain? What'd you net from that bad girl?

Click to expand...

graying.geek said:

Thanx, Pop.

I see 2 types of yellowing on the bud leaves: The ones that are all yellow have been that way since I light-burned them a couple of weeks ago. The ones that got my attention last evening are the ones that can be clearly seen top-middle-right, looking like they have a green stripe going down the midrib. You think this is all light burn?

BTW, the photo of your burple grow is impressive for a Noob like me. Looks like a sativa strain? What'd you net from that bad girl?

Click to expand...

The closest thing it looks like is a Nitrogen deficiency. You're doing fine. Just give them water for the rest of their lives and let the soil and plants do their thing.

pop22 said:

Mid plant could be a micro nutrient deficit, but IMO, its still light burn. A dose of some micros wouldn't hurt, this late use pretty much any micro, even bottled its not going to affect the buds.

Click to expand...

RandomHero8913 said:

The closest thing it looks like is a Nitrogen deficiency. You're doing fine. Just give them water for the rest of their lives and let the soil and plants do their thing.

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Thanx for your ad hoc mentoring, guys. Nice to have all that experience at my beck n' call.

Starting week 9 of 12/12. Well, the end is clearly approaching; the girls are all taking part in self-canabilization as they're consuming their own leaves. It's surprised me how toasted the buds became that were subjected to the strips being too close for a day. All of the sugar leaves are yellowed and dying or already dead, and the pistils on those buds don't look much better. The buds have all sprouted some nice, white pistils, but I suspect that the damage to the yield and potency has already been done. Yes, I've kicked my own butt several times for making such an easily avoidable mistake.

Anyway, here's the field:



The partial saving grace is that the buds on the right and left 1/3 of the scrog look pretty good.

Irrespective of which bud I check, there will be some areas with all milky trichs but no amber:



and other areas, on the same bud but typically lower down, that look ready to harvest:



So, what do you guys wait for? All of the buds to show some amber trichs, or do you pull the trigger when you seen the proportions of milky:amber reach a certain level in a spot check? Note that I'm *not* asking about acceptable proportions of amber to milky, but rather: What conditions constitute your signal to harvest?

Actually the appearance of the buds. At some point you just see them finished... they put on alot of weight within the last 10-14 days. Shake the buds a little at the stems, get a feeling for it. Take a bud, and press it with you fingers, you'll feel the changing of density. Take the microscope to help you determine the harvest, but learn by your experiences! Watch the pistills carefully, are there still coming out new ones? How is the ratio to hairs getting brown. Harvest some buds earlier, harvest some buds when they are ripe, and let some buds go for additional 1-2(+) weeks. You can see a bud having a golden glitter without a microscope! A microscope is just there to confuse newcomer...

Old or damaged trichromes will always get amber, so most likely you will find them on older leafs, or buds you put your fingers on. And you will always find clear trichroms, because the plant is producing more and more... but at one point the conversion of thc>cbn is bigger that the plant is producing new thc. So you want to harvest before this degradation kicks in.

Some strain you will like to smoke when it's mellow, another strain you'll want to harvest way earlier... check out growweedeasy, when I remember correctly they have a good tutorial on the ripening stages.

You are charting untested waters and the results look promising.
Am redesigning around a space half as big. Whatever the final
configuration the coverage is edge to edge - and so is fixture.

Distance is a learning process. Where it's too close mark it on wall.

Serva said:

Actually the appearance of the buds. At some point you just see them finished...

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Thanx, Serva. Being an "if X, then Y" kind of guy, I was hoping for a more formulaic method -- like the promise I read on forums that: "trichomes are the answer!" -- but I get what you're saying. Experience is the key, so some experimentation is in order. That I can relate to.

Sure, you can do it by trichromes, get 5% clear, 10% amber, and 85% cloudy... but will you count them to get down to one formula? And you have to check everytime you want to harvest, on every plant, to be precise. But if you learn by WATCHING the buds maturing, your reward will be much bigger!

1. you learn your own personal preference (CBN is always belittled, as the substance that makes you "sleepy". Actually it has more to do with the strain, than with CBN. CBN will also reduce paranoia, tachycardia, making some trippy strains more enjoyable. My personal preference is up to 30% amber, because I am easily effected by these "negative" effects of THC)
2. in a few grows, you will open your door and directly see whats going on, without the need to get a microscope first.
3. it's all about the connection to your plant. Neither nutrients can be calculated, nor harvesting. It's like sending an arrow... the most important is the very last body movement, releasing the string. If you don't learn/feel this last movement, you will never hit properly. And you will never harvest properly, just by checking on the trichromes.

Btw here is the thread about harvesting: https://www.rollitup.org/t/trichomes-harvesting.516184/

"Trichomes are of course not the only indicator when to harvest. There are other factors that should be taken into account when determining when to harvest."

HalfBee said:

...Am redesigning around a space half as big. Whatever the final configuration the coverage is edge to edge - and so is fixture.

Click to expand...

Good call, HB. That's the way to take advantage of the fact that these strips can be configured to assure your entire canopy is evenly covered and about the same distance from the light source.

What are the dimensions of your grow space? I'm interested in what you end up with for a design.

HalfBee: said:

Distance is a learning process. Where it's too close mark it on wall.

Click to expand...

Yeah, the simple key for me would have been to start high, then go lower in small increments. I just eyeballed it and figured 12 inches was high enough, thereby toasting 1/3 of my grow. Crap!

Grow canopy space 21d x 28w (2x2 for general calcs)
Box and current Vero light found HERE
Going back to last year around this time was the planning
stages, and a new Mango run will usher in whatever EB/Vero
monstrosity happens to appear in the next month or so...

I also got inspired by the thread, and EB's.
I would love to do one the size of your's gg,
but space and stealth will rule my build, so
I got the 560's. I got mine today from Arrow,
14@$7.04 /W free fedX International Priority
and only had to pay $15. VAT to the driver.
You normally also have to pay VAT on the
shipping costs which can add up. 7-EB back
to back in the pack.

graying.geek said:

Starting week 9 of 12/12. Well, the end is clearly approaching; the girls are all taking part in self-canabilization as they're consuming their own leaves. It's surprised me how toasted the buds became that were subjected to the strips being too close for a day. All of the sugar leaves are yellowed and dying or already dead, and the pistils on those buds don't look much better. The buds have all sprouted some nice, white pistils, but I suspect that the damage to the yield and potency has already been done. Yes, I've kicked my own butt several times for making such an easily avoidable mistake.

Anyway, here's the field:

View attachment 3979872

The partial saving grace is that the buds on the right and left 1/3 of the scrog look pretty good.

Irrespective of which bud I check, there will be some areas with all milky trichs but no amber:

View attachment 3979871

and other areas, on the same bud but typically lower down, that look ready to harvest:

View attachment 3979870

So, what do you guys wait for? All of the buds to show some amber trichs, or do you pull the trigger when you seen the proportions of milky:amber reach a certain level in a spot check? Note that I'm *not* asking about acceptable proportions of amber to milky, but rather: What conditions constitute your signal to harvest?

Click to expand...

I go all different times for all strains...different smells and heady effect. Terpenes and Terpoinoids and flavones and anthocyanins are all having their say too...

It seems that the distance you need is alot about the enviroment. I was wondering why 12" was too much. So I did my own measuring (I am not used to inch, so results were quite suprising)...

growspace 1/4 of 32"x16" with 50W @ 2"

growspace 12"x16" with 100W @ 3"


No one can tell you whats correct... you need to try it

Beginning week 10. It was obvious late last week that one of the 4 girls, the one that made up the middle 1/3 of the canopy, has been in a slow decline since being injured, ostensibly from light burn. Before I reconfigured the light the buds on this plant were comparable in size and density to all of the others, but after being burned, they stopped developing completely and just seemed to go down hill without the buds ripening.

So, Sunday AM I pulled out the pruning shears and triming scissors and harvested & trimmed the buds from the 1 plant:



It's still drying but I suspect I'm going to end up with 2-3 oz of fluffy little popcorn buds of low potency. I'll give one a puff later this week after drying, but I suspect these buds will end up in the compost.

The remaining 2/3 of the scrog, though, are looking pretty good. A second of the 4 plants also suffered some burn, but the buds on it continued to develop and are not looking too bad. The buds on the 2 healthy plants look good, and probably represent what the whole canoy would've looked like had I been cognizant of the light intensity. The mantra of all new growers: Next time.

This plant was harvested this morning and I'm optimistic re: the quality of the buds. They're nice and fat, dense, sticky & smell -- like the good stuff. We'll see:



The final 2 plants -- one moderately light burned, the other is fine -- I expect to be ready by EOW.



Sadly, there's no way I'm getting my predicted 12 oz from this grow, but I'll be happy to get 6 zeez of the healthy buds. Sigh...

graying.geek said:

Beginning week 10. It was obvious late last week that one of the 4 girls, the one that made up the middle 1/3 of the canopy, has been in a slow decline since being injured, ostensibly from light burn. Before I reconfigured the light the buds on this plant were comparable in size and density to all of the others, but after being burned, they stopped developing completely and just seemed to go down hill without the buds ripening.

So, Sunday AM I pulled out the pruning shears and triming scissors and harvested & trimmed the buds from the 1 plant:

View attachment 3984475

It's still drying but I suspect I'm going to end up with 2-3 oz of fluffy little popcorn buds of low potency. I'll give one a puff later this week after drying, but I suspect these buds will end up in the compost.

The remaining 2/3 of the scrog, though, are looking pretty good. A second of the 4 plants also suffered some burn, but the buds on it continued to develop and are not looking too bad. The buds on the 2 healthy plants look good, and probably represent what the whole canoy would've looked like had I been cognizant of the light intensity. The mantra of all new growers: Next time.

This plant was harvested this morning and I'm optimistic re: the quality of the buds. They're nice and fat, dense, sticky & smell -- like the good stuff. We'll see:

View attachment 3984476

The final 2 plants -- one moderately light burned, the other is fine -- I expect to be ready by EOW.

View attachment 3984478

Sadly, there's no way I'm getting my predicted 12 oz from this grow, but I'll be happy to get 6 zeez of the healthy buds. Sigh...

Click to expand...

No big deal bud. Got most of them start to finish looking pretty damn good. With a neat little set up you can call your own none the less. Your light is all squared away and you have the knowledge to take to the next grow. Was fun to watch, thanks for sharing!

Compost the popcorn???? Why not make some canna coconut oil with them? the oil is good for not only cooking, it makes an excellent topical also. I use it on my legs at night as I get terrible leg cramps in my sleep. works for many other things also, and you can cook with it too. Oil not strong enough? then add the same amount of trim to the oil and cook it a second time. A lot
more cannabinoids in the trim than you think!