Is this a cal mag def starting?

[Cheffrey]

starting to show browning, it's happening in a couple others spots on other colas.
I only see it at the top bud sites in the leaves
Is it Cal mag issue? Light to close? I was running the lights pretty close 12" led

 

[labexperiment]

I would say it is yellowing, as good as a picture is more information is required to help solve issues, with the tip burn it could also be nutrient lock out if you are using nutrients, I do not believe you have supplied enough information to get good advise.

 

[Cheffrey]

Miracle Gro Moisture Control Potting Mix, 28.3-L | Canadian Tire

Miracle Gro Moisture Control Potting Mix helps protect against over and under watering | Canadian Tire

www.canadiantire.ca

This is the medium I grow in

Temps at night are 18 celcious
Temps at daytime 22 or 23 celcious...varies day to day
Humidity is between 46% and 51%
7gallon fabric pots
I use 3 Mars hydro sp250
4*4 grow tent
Good exhaust , 6 inch fan, passive intake
Big fan blowing on bottom and little one up top


I feed nutrients at ph 6.6 in distilled water
Ppm is 550 with nutes and cal mag

I flush after 3 feeds with tap water that is left out for 24hours ph 6.6


I thought tip burn meant to much nutes in a feeding?

 

[labexperiment]

I thought tip burn meant to much nutes in a feeding?

It does, but can also lead to nutrient lock out. It does not look like light stress. My best guess at this early stage would be a calcium deficiency.

 

[bobrown14]

There's too much leaf material. Thats usually from too much N.

The yellow looks like you may have spilled some of your nutrient mix on the plants.

Try not to spill anything on you plants other than plain water.

I'd cut back on fertilizer. I'm organic soil so not expert on nutrients used here other than familiar with the company that is owned my Monsanto. Food for thought on that.

A lot of nutrient users like to use a lower pH water to start with. Say 5.8pH but there should be a recommendation from the manufacturer that I would follow.