Nutrients problem

[Kye111]

Hey guys,
I have a clone of zkittlez glue I started late August outdoors in a pot. Growing in a lowes bought soil with no nutes added. I'm using fox farms big 3 as per chart. I'm probably about week 3-4 into flowering and have noticed the leaves turning yellow in spots on an otherwise healthy plant (i think). I'm not great identifying problems like this can anybody help? Thanks

 

[Phytoplankton]

First, welcome and congratulations, your plants look real nice.

Are you using cal mag? That could be the start of a cal mag deficiency (among other things). Also, since you’re using synthetic nutes have you done a flush to clear salts out of the soil? That can cause a “lockout” of nutrients.

 

[Doctor Trevor]

Looks like a magnesium/calcium deficiency.

I have to treat all my plants with cal/mag; they all have this problem.

 

[Kye111]

Thanks guys. I was leaning toward the cal/mag deficiency but was sure and didn't want to just add something. I have been flushing even though I have left her out in a couple of hard rains by accident. Again thanks for the help.

 

[Roy Growin]

Hi @Kye111

I know it sounds obvious, but do a quick double-check on the underside of the leaves to rule out mites
The blotches actually look like clusters of tiny spots, localized - a CaMg def would show over the whole plant
Hope I'm wrong and just paranoid about the little F... erm, darlings

 

[Kye111]

Hi Roy,
Thanks for the concern but I don't believe it to be a pest problem. I have battled spider mites early on and got rid of them quick. It's a small plant that's only about 1ft by 2ft. I started it as more of an experiment of what would happen to a clone that was in veg for 3 weeks under weak lights to go right outside at late August. I'm kind of surprised to see where she has got to. Not hoping for much of anything just experience.
Happy growing