Help! Rust & Beige Spots Cannabis Leaf

[Griszo]

I Need help to diagnose this deficiency/excess of nute or pests (fungus)?
Indoor grow, temperature control 23~28 deegrees, humidity 55%, Led 1000w (185draw)
Nutes with half concentration (top veg, green explosion).
Please help to indentify.. its gettinh

 

[George Mc]

I would say you splashed water or nutrients on that leaf.

 

[Griszo]

I would say you splashed water or nutrients on that leaf.

What informations you need more? I didnt splashed anything on leaves last 30 days... what do you think it could be?

 

[George Mc]

What informations you need more? I didnt splashed anything on leaves last 30 days... what do you think it could be?

That's my only guess, I'm a newbie also.

 

[George Mc]

I do have two questions. What is your pH ? And is this the only Leaf doing this?

 

[Sask420grow]

Calcium deficiency I believe. Google search shows similar leaves discolouration

 

[TURBOKILLER]

I have something that looks similar. But Ca and Mg deficiencies usually only manifest themselves between the veins, the spots don't normally touch the veins (see attachment). Plus, Ca and Mg are mobile nutrients, meaning that if the apical parts of plant start lacking them, lower plant "send" Ca nd Mg over to the tops. Therefore deficiencies start to appear on the bottom leaves.

Anyway, try adding some calmag to your water and spray the plant with 1ml calmag in 1L of water solution at lights off. This last measure shows results very quickly, at least in my limited experience.

PS: some larger spots do look like water drop burns.

 

[Ganjagrandaddy]

have you checked underside for any critters , anything flying around the grow room ?. does look like Cal mag issue tbh but would double check for crawlies. also spills to leaves can take time to show up as light still passes through it .