Hello new here and really need help...

Hi all. First grow with Northern Lights feminized. Started grow under 400 watt MH. Two months in and I moved one plant under Mars-hydro 96 X 3 watt LED light. Plant in one day began to look like this




So- I being new, immediately moved the plant under a 600 watt MH raising the light 24" above the plant and moved a second plant under the same light.











I researched my problem and learned that I might have a mag deficiency problem. This problem is notoriously seen with LED lighting. I also learned that it's possible that I may have burned the plant with the LED lighting. I since added cal/mag one tablespoon/ 5ml per gallon of water with regular nutes.

Here's the problem, the fan leaves drying out and dying still continues. More so with the far right plant which is the only plant I had under the LED. The middle plant- which you see on the left is now starting the same problem.


I can only speculate that the LED light must have reach a leaf or two on this one as well.

Now look at my third plant which has only stood under the 4oo watt MH. No problems what so ever.







Northern Lights feminized via Nervona
Fox Farm Ocean Forest potting soil
5 gallon pots
Watered evry 4th day with ro/do water. Every other watering I use nutes.
Fox farm nutes
18 hours light
400 watt MH 18" above plant
600 watt MH 24" above plant

pics of growing environment




Thank you for your help with this...

Please explain to the membership, "might have a mag deficiency problem. This problem is notoriously seen with LED lighting. thanks

What is your tds reading?

vostok said:

Please explain to the membership, "might have a mag deficiency problem. This problem is notoriously seen with LED lighting. thanks

Click to expand...

Thx for the fast responce. This is what I researched on various thread and a youtube reply. Like I said in my post, one day under LED light and blamo. Problems that still continue.

fandango said:

What is your tds reading?

Click to expand...

Thanks for the responce. I only have a ph meter at this time.

cut out all the bad leaf...sometimes if you spill nutes on the lower leaf it will turn the leaf black,the other stuff(good leaves)keep and eye on and the top growth...since you have no meter follow the directions fox farm gives you from the bottle,but cut in half and bring it up as the plant grows.watch out not to over nute at all times.

Looks like overwatering damage...nice clean setup btw

fandango said:

cut out all the bad leaf...sometimes if you spill nutes on the lower leaf it will turn the leaf black,the other stuff(good leaves)keep and eye on and the top growth...since you have no meter follow the directions fox farm gives you from the bottle,but cut in half and bring it up as the plant grows.watch out not to over nute at all times.

Click to expand...

As far as nutes go, I only use every other watering and I only use half strength.

Andrew

Diabolical666 said:

Looks like overwatering damage...nice clean setup btw

Click to expand...

Thank you .

Andrew

fandango said:

What is your tds reading?

Click to expand...

OK amazon is the snit. I ordered a bluelab ppm meter after we communicated. They just delivered the thing. Holy snit...