Missing something BIG with LED lights. Please help.

[AloeRuss]

I been growing for 10 plus years but never under LED.

I purchased several “Growers Choice 200 w” LED lights and I just don’t recognize my always thriving green and otherwise healthy plants.

I grow in coco with perlite. Using:
Tap water with evaporated chlorine.
Flora micro 3ml
Flora Grow 4 ml
Flora bloom 1 ml
Azos 2 scoops per 5 gallons.
PPM 550
PH 6.2
Humidity 65-70
Temp 80-81
The light is about 23 inches away.

ALL bottom nodes on all plants are literally stunned. Something I never saw before with CFL bulbs.

Please help me to investigate. I don’t know what I am missing.

Thank you so much.

 

[GoatCheese]

200 watts is alot of light at that distance to canopy. I have 60 watt Samsung strip-led light in my veg cab and i have it using about 30 watts at about 40cm distance.
- I have Cree COB-light in my bloom tent and i can’t use much more than 90 watts out of that light with about 60cm to canopy or the leaves on my plants will start to show led-radiation symptoms; the leaves lose their waxy look and start to go pale/yellowing and feel dry in your fingers.

If those lights don’t have dimmers then you need to raise the lights higher.

Modern white leds are totally different lights compared to CFLs and HPS/MH lights, and they will dehydrate leaves very fast if they are too close to the plants.

People give a bit of extra calmag and or epsom salts which will help keeping leaves in better shape.

Also if you’re hand watering your little clones don’t allow to coco to dry out, cause it makes the led radiation symptoms even worse.

 

[Creeperpark]

That's why I start my seeds and clones under fluorescents lights. They do much better and always gives a stronger, super faster start. I've tried LEDs HPS, MH for young plants, but the fluorescents have been my GO TO light for seeds, seedlings, early veg, and clones.

 

[Switcher56]

I been growing for 10 plus years but never under LED.

I purchased several “Growers Choice 200 w” LED lights and I just don’t recognize my always thriving green and otherwise healthy plants.

I grow in coco with perlite. Using:
Tap water with evaporated chlorine.
Flora micro 3ml
Flora Grow 4 ml
Flora bloom 1 ml
Azos 2 scoops per 5 gallons.
PPM 550
PH 6.2
Humidity 65-70
Temp 80-81
The light is about 23 inches away.

ALL bottom nodes on all plants are literally stunned. Something I never saw before with CFL bulbs.

Please help me to investigate. I don’t know what I am missing.

Thank you so much.

Is this your 1st run using LEDs? It could very well be strain specific.

I have used LEDs from day one and never had an issue. My veg tent is 2x2x3ft with a 300w LED. Mind you I don't set by distance, I set the height of my light by light intensity:

• cuttings/seedling 60-90 umols
• clones 100-200 umols
• veg 300-425 umols
• flower 700-1200 umols

I as well use tap water. I grow in HP Promix with an additional 25% perlite, using Remo nutes.
I used CFLs on my 1st run and I simply didn't like the stretch, which can be problematic growing indoors (height). FWIW I flower under 600w in a 3x3x6ft tent. YMMV...

 

[negative37dBA]

Have you checked for any bugs/pests. Russets will stunt young growth. More, better pics and additional info would be helpful. One of your fans leaves is curling in on itself a bit. One sign that your leaves are being bit. Time to break out the 30-40x loupe and do some checking. I grow under led for veg and mine love it. I run 2 HLG 65 v2 boards. I keep them about 12-18" off the plant. Put 1 back under a hid or t-5 and see what happens. Check for bugs first.
Have a great day all. Peace, negative.

 

[AloeRuss]

Have you checked for any bugs/pests. Russets will stunt young growth. More, better pics and additional info would be helpful. One of your fans leaves is curling in on itself a bit. One sign that your leaves are being bit. Time to break out the 30-40x loupe and do some checking. I grow under led for veg and mine love it. I run 2 HLG 65 v2 boards. I keep them about 12-18" off the plant. Put 1 back under a hid or t-5 and see what happens. Check for bugs first.
Have a great day all. Peace, negative.

Hi. Thank you all for response.
no. No bugs at all. I water them only twice a week. I should start doing it more often.

 

[Switcher56]

Hi. Thank you all for response.
no. No bugs at all. I water them only twice a week. I should start doing it more often.

... and the're in coco? Most water daily if not twice a day... Not my bailiwick sorry...

 

[wunderbra]

I purchased several “Growers Choice 200 w” LED lights and I just don’t recognize my always thriving green and otherwise healthy plants. ?

Looks fine to me. Have you considered going over to Flood-and-drain, from all that mushy mud pies mix? Heh. And, can you post your grow lights make and model and perhaps add a pic from the manufacturers website? Thanks.

 

[negative37dBA]

Good to hear no buggies. I too am I big fan of flood and drain. I only use hydroton...kind of hard to over water it..haha. A couple close ups would help. It is hard to tell but they don't look that bad. Have a great day all. Peace negative.

 

[draztik]

200 watts is alot of light at that distance to canopy. I have 60 watt Samsung strip-led light in my veg cab and i have it using about 30 watts at about 40cm distance.
- I have Cree COB-light in my bloom tent and i can’t use much more than 90 watts out of that light with about 60cm to canopy or the leaves on my plants will start to show led-radiation symptoms; the leaves lose their waxy look and start to go pale/yellowing and feel dry in your fingers.

If those lights don’t have dimmers then you need to raise the lights higher.

Modern white leds are totally different lights compared to CFLs and HPS/MH lights, and they will dehydrate leaves very fast if they are too close to the plants.

People give a bit of extra calmag and or epsom salts which will help keeping leaves in better shape.

Also if you’re hand watering your little clones don’t allow to coco to dry out, cause it makes the led radiation symptoms even worse.

Listen to this post. The LEDs are too intense for those plants. Either dim them or move the lights as high as you can, if you can't do either use something to diffuse the lights. If your using GH Flora series in coco you should try out H3ads 6/9 formula. 6ml/Gallon Flora Micro 9ml/Gallon Flora Bloom pH 5.8, CalMag as needed and ditch the Flora Grow completely.

 

[Guest]

Ignore al these posts.

Leds don't transpire well because of the leaf temperature differential. I've added a quarter cup of TM-7 per cubic foot, a half cup of gyp/dol and 100ppm cal + 30ppm mag with every watering under Led.

Get an IR thermo and download the Cannafused vpd calculator to see how slow your plants are actually transpiring. If you haven't noticed how slow they drink compared to your old lights, you're over watering them.

 

[Switcher56]

Rotfl They don't have a rolly. LOL!

BTW, do you hae a glass belly button?