When your plant HATES LEDS..

Have you ever switched lights and experienced plant shock?

  • -Never

  • -Yeah, no big deal

  • -Yeah, it was disastrous!

Results are only viewable after voting.
MasterpieceNutes

MasterpieceNutes

Well-Known Member
So FYI, you can't easily move a crop from HPS or MH or Flouro to LED. -They shock hard.

Ditto with store bought clones if they utilize the above. 5 days plus into shock..

I've started seed in rockwool in humidity domes under flouro and transplanted immediately to LED after sprouting. No shock.

Leave under flouro too long and then move to LED: significant shock.

I'm not sure about natural sunlight starts top LED.. shocks?

Just putting this out as an FYI. A lot of people obviously making LED transitions who read this forum. Only solution I have is to treat for shock: reduced light, maybe some superthrive treatment and water.. Keep room temps moderate, no stressing the plants on top of shock. Recovery in a week or so.. yuck.

Anyone else have any 'coping' strategies: share the knowledge please ;)

Smart cloning nurseries will start utilizing LED raised clones I hope as this stuff gets legal everywhere. YES on 4 in MA ;)
 
pop22

pop22

Well-Known Member
Well, I find these statements interesting because I transfer seedlings and clones from very low power led to Full sun, to a 400 watt COB light ( a DIY True 400 watts ), to my greenhouse. Never had any kind of "shock". In fact, I often see up to 1/2" of new growth in 12 hrs or less.
Some other factor must be in play. Seeds planted outdoors in May get blasted with near maximum sunlight, funny they do just fine. No, I don't buy this theory at all and never have.



MasterpieceNutes said:
So FYI, you can't easily move a crop from HPS or MH or Flouro to LED. -They shock hard.

Ditto with store bought clones if they utilize the above. 5 days plus into shock..

I've started seed in rockwool in humidity domes under flouro and transplanted immediately to LED after sprouting. No shock.

Leave under flouro too long and then move to LED: significant shock.

I'm not sure about natural sunlight starts top LED.. shocks?

Just putting this out as an FYI. A lot of people obviously making LED transitions who read this forum. Only solution I have is to treat for shock: reduced light, maybe some superthrive treatment and water.. Keep room temps moderate, no stressing the plants on top of shock. Recovery in a week or so.. yuck.

Anyone else have any 'coping' strategies: share the knowledge please ;)

Smart cloning nurseries will start utilizing LED raised clones I hope as this stuff gets legal everywhere. YES on 4 in MA ;)
Click to expand...
 
pop22

pop22

Well-Known Member
Next time I move seedlings, I'll document the first 24 hrs in pictures, with time stamps and measurements of the plants. Who knows, maybe I'll prove myself wrong! I doubt it though.
 
Trippyness

Trippyness

Well-Known Member
pop22 said:
Well, I find these statements interesting because I transfer seedlings and clones from very low power led to Full sun, to a 400 watt COB light ( a DIY True 400 watts ), to my greenhouse. Never had any kind of "shock". In fact, I often see up to 1/2" of new growth in 12 hrs or less.
Some other factor must be in play. Seeds planted outdoors in May get blasted with near maximum sunlight, funny they do just fine. No, I don't buy this theory at all and never have.
Click to expand...
I have also never had an issue transfering to outdoors at all. Only LED.
 
Trippyness

Trippyness

Well-Known Member
churchhaze said:
I'm surprised nobody has told him plants under LED need more "cal-mag" yet... (as if that's a thing)
Click to expand...
My plants under LED are much more prone to Calcium and Magnesium deficiency. I have noticed this myself.
I have talked to a bunch of growers who use more Cal/Mag when running LED /COBS.
My guess is more photons so they eat more, but since running multi feed coco I find I use the same amount as opposed to single feed every other day or so.
I dont think its just LED, I think its just a higher Photon count than more people are used to when running GOOD high powered LED. Cant be sure though, but Cal Mag was needed much more when under LED single feed coco.
 
a mongo frog

a mongo frog

Well-Known Member
Trippyness said:
My plants under LED are much more prone to Calcium and Magnesium deficiency.
Click to expand...
Really? Wonder why that is? I use HPS and i use a shit load of cal mag. Pretty sure a lot of coco growers also use a shit load of cal mag no matter what the light source is. Admit your getting used to posting horeshit lately. No offense i do that from time to time also, just want you aware of what you've been doing.
 
Trippyness

Trippyness

Well-Known Member
a mongo frog said:
Really? Wonder why that is? I use HPS and i use a shit load of cal mag. Pretty sure a lot of coco growers also use a shit load of cal mag no matter what the light source is. Admit your getting used to posting horeshit lately. No offense i do that from time to time also, just want you aware of what you've been doing.
Click to expand...
Horse shit? Really?
I am giving an opinion and yes in Coco I run more Cal Mag, BUT I was running more than I should have under LED than HPS.
I give opinion and advice.
Quote me horse shit and I will rebuttle mate.
If you did not see I said "MY" not "ALL", thats my opinion for my specific grow.
 
The Dawg

The Dawg

Well-Known Member
Trippyness said:
Horse shit? Really?
I am giving an opinion and yes in Coco I run more Cal Mag, BUT I was running more than I should have under LED than HPS.
I give opinion and advice.
Quote me horse shit and I will rebuttle mate.
If you did not see I said "MY" not "ALL", thats my opinion for my specific grow.
Click to expand...
Well I'm Calling Bull Butter On Your Horse Shit Just Saying Bull Butter :hump:
 
pop22

pop22

Well-Known Member
I don't know why the cal/mag issue either. I agree, the more intense your light, the more your plant can uptake nutrients. But I have used the exact same amounts of cal/mag even when running MH&HPS. I ad cal mag to all water used in my garden because I have to run RO ( my tap water kills Cannabis...really its weird, only Canna.. ). I use 90 ppms/gal. in veg and 120 ppms from the first sign of flower. With my new lights, it may not be enough, but so far, no sign of problems. I'll know more when they go into flower.
 
N

NewI

Well-Known Member
I once moved some 30 day old from 200w cob to the balcony. When the sun hit them they just crashed. Stems got week and just felled down. Took me a while to figure what was happening.
 
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