Could my lights be causing this?

T

tilopa

Well-Known Member
I'm at my wits' end. Trying to figure out what could be causing the plant problems I am having in veg. The only things that are different really is the medium (course coco core) and the lights - EB Gen3 4k CRI90.

Here are my details:

- Nutes = Jack's hydroponics
- EC = 1.5
- PH = 6.0
- water temp = 64f
- Room temp = 80f
- RH = 65%

I'm definitely not over watering, maybe under watering slightly.

I know this is a LED forum and not the Infirmary forum but I wanted to give details of my line of thinking in case I am missing something. Because at this point the only thing I can think of are the lights.

EB Gen3 4k CRI90. The PAR at the canopy is about 240 umols/m2/sec. This value was derived at by using a lux meter and converting.

Is it possible my lights are causing this carnage?

5061518358287325271.jpeg 4343657120332911281.jpeg 8559819942203138448.jpeg
 
O

oill

Well-Known Member
tilopa said:
I'm at my wits' end. Trying to figure out what could be causing the plant problems I am having in veg. The only things that are different really is the medium (course coco core) and the lights - EB Gen3 4k CRI90.

Here are my details:

- Nutes = Jack's hydroponics
- EC = 1.5
- PH = 6.0
- water temp = 64f
- Room temp = 80f
- RH = 65%

I'm definitely not over watering, maybe under watering slightly.

I know this is a LED forum and not the Infirmary forum but I wanted to give details of my line of thinking in case I am missing something. Because at this point the only thing I can think of are the lights.

EB Gen3 4k CRI90. The PAR at the canopy is about 240 umols/m2/sec. This value was derived at by using a lux meter and converting.

Is it possible my lights are causing this carnage?

View attachment 4815574 View attachment 4815575 View attachment 4815576
Click to expand...
Agree... put your ec down to 1 and feed them.more regularly
 
PJ Diaz

PJ Diaz

Well-Known Member
The Dawg said:
You have a toxicity problem not an intensity problem. Looks like a nitrogen lock out issue to me now its caused by either not washing you coco properly or your nutrient solution is too hot.bongsmilie
Click to expand...
I agree. If anything there is lack of light which is adding to the problem.
 
LEDTonic - Daniel

LEDTonic - Daniel

Active Member
As previous posters said, you're definitely not giving your plants too much light.
During early veg 200-300 µmol/m2/s is reasonable. During mid and late veg you can pump that up to 300-400.

My best guess is also a nutrient issue.
 
T

tilopa

Well-Known Member
Thanks for all the feedback.

Yes, I'm realizing now that my nute solution is way too hot. Which is weird because with the Grodan blocks I can go north of 2.0 without any issues.

However, I forgot to mention that I got the clones from an outside source so I dunked them with the nasty stuff immediately, and again 7 days later. I don't like doing this but recovering from russet mites and not taking any chances. So, they were probably stressed to begin with and couldn't handle the higher EC.

Reading up on the coco forums I'm finding that typically the coco guys go much lower on the EC.

I just flushed them with .4 EC PH 5.8 solution. Next feeding I'm going to run the EC at 1.0 and put the lights back to down.
 
Star Dog

Star Dog

Well-Known Member
Thats to strong at 1.5 imo my ec just now at 2 weeks into 12/12 is 1.2
DSC_0005.JPG
You can't underwater coco it's absolutely essential to wash any salt out daily with run off.
 
Star Dog

Star Dog

Well-Known Member
jonnynobody said:
Coco was too much work for me and far too complicated. Results were underwhelming. 100% #4 chunky perlite @ 1.6 EC water to waste hydro in hempy buckets:
View attachment 4816245
Click to expand...
Yes I'd have no problem if I had to use perlite it's good stuff, I used 100% perlite previously with very reasonable results, my 1st venture into hydro was with perlite in smart trays, a similar thing to a autopot, considering I didn't really understand hydro I scraped by with very little issues.
 
cobshopgrow

cobshopgrow

Well-Known Member
i am trying this coarse cocos /chips atm too.
thinking its way less salty then cocos pith and mine was very easy to wash.
problem with cocos is often the releae of a lot K when it dries, the fibre simply contains lots of it.
K have a single charge and is released everytime it got replaced by a doubble charged mg or ca.
this can be a good thing later in flower, otherwise it often cause problems if not taken in to account.
well the cocos chips really cant be overwatered so giving them a good flush cant hurt.
runoff shouldnt be higher then 0.2 more to hats going in.
dont think you need to go down to EC 0.4, 0.8 should also to.

i never needed a EC of 1.5 at this stage, 1 to 1.2 should normally do well.
dont go too high with the basesalt would say, give more calcium nitrate as the meidum eats some of the calcium and the cocos provides lots of K anyway.

you have quite some factors in to play when you have dunked them in nasty stuff recently, maybe thats simply the cause of the burns.

while, consider also.
what you captured with the lux meter and converted can be way of.
sensitive young plants i sometimes just give a 200ppfd and even less, just as much that they dont stretch to the light and have a easy life.
your cuts there really dont look like theyre after heavy growth atm, looks to me they want to root out a bit and then grow for you.
so going easy on them now is may a good idea, think its quite important to start them slowly in a new enviroment.

its maybe a combination of several factors.
 
J

jonnynobody

Well-Known Member
Star Dog said:
Have you defoliated some leafs or is it just the strain/pheno?
Click to expand...
In the process of heavy defoliation. Once more at week 3. Otherwise the canopy is full of leaf that shrouds most flower sites resulting in few top shelf colas. Defoliation solves that problem. Ghost train in the front just does not grow leaves. Kinda like gg#4. Very potent flowers, but no foliage. I find that's been common with pure sativa or sativa dominant strains. Tall. Lots of branches. No dam leaves. Leggy as shit. If I didn't defoliate it would just be a jungle of leaf diminishing the value of my yield significantly. You haven't seen anything yet. Wait until you see when it's actually defoliated. 10 days later you'll never know it even happened, but the flower sites that were previously shrouded will have been allowed to grow and proliferate. Final defoliation at week 3 cleans up the canopy for a solid finish where the flower sites are all bathed in sunlight. Of course the week 3 defoliation is a much lighter defoliation. Why? By week 3 most strains will have completely stopped all vegetative growth and will devote all biological reserouces into flower production. In a nuthshell there will be no regeneration. You can't leave them naked. You want to go in with a surgical approach to ensure a big fat fan leaf isn't blocking a bunch of what could become primo top shelf flowers. After the week 3 defoliation it's just watering, staking branches, supporting heavy colas, and running an occasional pure water irrigation to rinse away fertilizer salts from the medium.
 
J

jonnynobody

Well-Known Member
bernie344 said:
Did u end up topping those long branches ?
Click to expand...
As much as could be done. That is ghost train haze x moonshine haze. Almost a pure sativa. Legs for days. Few nodes even with topping. The payoff with this particular strain is it forms potent, resinous, dense and highly desirable golf ball sized flowers at each node site. Quality is consistent from the bottom branches below the canopy to the tops directly under the light. Great genetics. Not stellar yields though. I couldn't run more than 2 buckets of this strain. It's what I refer to as a foo-foo boutique strain. I personally do not like it and do not smoke it. It's too much like gg#4 for me which I also do not like. My favorite strains so far have been blue dream which I'm flowering this cycle for the first time in over 10 years and bubblegum kush strictly from a satisfaction perspective. BD was also an incredible yielder. A lovely strain that should be in every cannabis garden's lineup.
 
bernie344

bernie344

Well-Known Member
jonnynobody said:
As much as could be done. That is ghost train haze x moonshine haze. Almost a pure sativa. Legs for days. Few nodes even with topping. The payoff with this particular strain is it forms potent, resinous, dense and highly desirable golf ball sized flowers at each node site. Quality is consistent from the bottom branches below the canopy to the tops directly under the light. Great genetics. Not stellar yields though. I couldn't run more than 2 buckets of this strain. It's what I refer to as a foo-foo boutique strain. I personally do not like it and do not smoke it. It's too much like gg#4 for me which I also do not like. My favorite strains so far have been blue dream which I'm flowering this cycle for the first time in over 10 years and bubblegum kush strictly from a satisfaction perspective. BD was also an incredible yielder. A lovely strain that should be in every cannabis garden's lineup.
Click to expand...
Ok nice one.
Like most I do want decent yields but its not the be all and end all, Its nice to have different strains for taste strength and high`s and make the grow more interesting, I love sativa high best.
 
You must log in or register to reply here.
Top