1st grow... first true leaves yellow?? *PLEASE HELP*

SolInvictus88

New Member
Hello, this is my first grow, I bought 2 auto flower seeds online from herbies seeds USA, I I bought 1 do-si-do auto, and one blue berry auto.
I have an air-cooled 1000 watt hps hooked up to a fan for ventilation
When I started this grow my buddy had some plants that had gotten basically forgot about, and I asked if I could try to save them, the were not autos and they were probably 2 Months into there veg, I couldn't save them, so instead of going to buy more soil I figured I would reuse the soil from those 2, my friend told me that they had been on a consistent nutrient schedule there entire life. So with my lack of knowledge and having not done much research yet, I thought that It would be a good thing that this soil was full of nutes.
The big plant in the pics is the do-si-do at 35 days it looks a little wonky because I'm experimenting with LST. It was planted in the same soil from the old plants after germinating in a wet paper towel. This one grew like crazy right from the start, I didn't even give it any nutes because it didn't show it needed any, until 5 days ago I got some yellowing on the tips and so I started it on on the GH micro, grow, bloom, and Calmag + and the yellowing tips went away, so this girl seems to be doing OK, I think?

Now for the issue I've got going on.
The seedling I'm the photos is my blueberry auto, picture taken at 5 days, planted in the same soil,
I noticed right away the deformation of the size of one of the cotyledons, and now that the next pair of leaves has sprouted they've got the weird yellowing blotchiness going on and I have no idea what it is/ what to do about it or how to fix it.
I would greatly appreciate some help from some of you experienced growers in here,
* what is it?
* how to fix it?
* how to prevent it from happening to any plants in the future?

Thank you very much!!
 

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Rsawr

Smoke and Mirrors
Staff member
The pot looks big and the soil looks wet. I'd guess overwatering. Don't let the soil stay swampy, especially this young.
 

Phytoplankton

Well-Known Member
Let them go pretty dry between waterings, but I wouldn't sweat the odd leaves or coloring yet. Let em get another set or two of leaves, they often work their way out of that. Seedlings have to adjust to their new life above ground, (light, soil, nutes) The leaf color kinda looks like variegation, so I wouldn't pull the fire alarm quite yet.
 
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