HELP! discoloration

[OGeMann]

I have discoloration on one of my white widow auto,she is at the end of week 2 flower 52 days from seed. temps at 75-78 degrees 50% humidity 62-64 degrees at night 50% humidity.fed her once with Formula 2: Bud/Bloom https://meigsfertilizer.com/products/weed-feed-formula-2
1/2 cup per plant and she is the only one showing this
I did install a new light- HLG 600 Rspec could that be the problem
.

 

[MeEasy]

Looks like that new light is a little to much for em

 

[OGeMann]

Looks like that new light is a little to much for em

yeah I know!! trying to figure it out but someday i figure it out hopefully

 

[dropinbiking]

The reddish look and the red leaf stems tell me she's getting a bit too cold overnight.

 

[MeEasy]

I like having a watt meter on my big light all the time. The dimmer is so touchy 0-50% is pretty close but between like 70-80 the watts jump from 300-500w real quick so with the meter on it I can see the actual numbers

 

[OGeMann]

The reddish look and the red leaf stems tell me she's getting a bit too cold overnight.

this is what I am telling every body and they tell me different

 

[dropinbiking]

62-64 might not sound too cold, it's around or slightly below my overnight temps in my grow area, I have noticed in past grows that plants closer to direct air flow will turn colour a little quicker or easier than other plants in the same room, if the temps are skirting that "too cold" limit.

 

[dropinbiking]

Here's what happened to one of my plants that stayed a bit closer to a fan during about a week of pretty cool overnights. In a perfect world you'd want to stay above 65, and closer to 68 for overnight temps to help avoid premature colouring.

 

[Canuck147]

If you have only fed them once - I'd say they're hungry for more - add some calcium-magnesium to go with it.

 

[OGeMann]

Here's what happened to one of my plants that stayed a bit closer to a fan during about a week of pretty cool overnights. In a perfect world you'd want to stay above 65, and closer to 68 for overnight temps to help avoid premature colouring.

to tell you the truth it is cool looking though... but does it effect the plant at all because I thought about shutting the fan off at night time but then I thought about mold and all that other bad stuff..so I just raised the fan a bit no direct air on them just a slight movement might work and tuned up the heat at night to 68-70, so far the discoloration didn't spread.

 

[OGeMann]

If you have only fed them once - I'd say they're hungry for more - add some calcium-magnesium to go with it.

the next feeding will be in about 2-3 more days so I will add a little bit more and see how they react to it. I prefer Epsom salt to cal-mag not to de respect you at all but cal-mag is really over rated

 

[OGeMann]

62-64 might not sound too cold, it's around or slightly below my overnight temps in my grow area, I have noticed in past grows that plants closer to direct air flow will turn colour a little quicker or easier than other plants in the same room, if the temps are skirting that "too cold" limit.

sense I got the AC infinity fan installed, I now have better control of heat and humidity now..it was time because I was almost ready to trow the towel.

 

[dropinbiking]

Yeah it can be tricky to control temp and humidity. I find it hard to stay within a few degrees of what I want sometimes.