Yellowing and black spots young clones :(

[HydroVeggies]

Hi, This is my first Hydro grow, and I started noticing yellowing several days ago and then most recently black spots!? I’m guessing it’s some sort of deficiency.. I read some of the guides here in how to diagnose common issues, but It’s hard for me to tell and so I was hoping to get an opinion from experienced growers.

I took these clones from my first outdoor soil grow which did really well .

strain is strawberry cough, they’re on a 18/6 light cycle and I'm feeding them the Same stuff I give my hydroponic tomatoes npk 20-18-38, current ppm at 800 flood twice a day. PH been kept at steady 5.5. I just flushed them thoroughly several days ago and going thinking perhaps nutes were too intense, but getting ready to mix up a new batch and adjust ratios per your guy’s feed back on this.

 

[Lucky Luke]

Old young leaf. Id ignore it unless its travelling to new growth

 

[HydroVeggies]

Old young leaf. Id ignore it unless its travelling to new growth

Hiya Luke, thanks for the reply! actually just checked, and yep, I am seeing what looks like the beginning symptoms on one or two of the newer mid node leafs as well . was gonna post pic, but got spam reject notification error v_v

 

[leather lungs]

Need pic of whole plant.

 

[PineappleExpress1007]

What ph is your water ? Looks a bit like nute lockout to me, hope this helps

 

[PineappleExpress1007]

Especially with purpleish stems unless that has something to do with the type of strain you have

 

[HydroVeggies]

I meant to upload full shots, but got a little caught up with work.. anyhow yep the stem color was like this on my outdoor grow I believe it’s genetics. I could be wrong though, they seem to be recovering, the older leaves just fell I think Luke was spot on. Fingers crossed