Can you confirm this is a calcium and magnesium deficiency?

[UkGrowNovice]

Hi all, after looking at some troubleshooting threads I reckon my plant my have a calcium and magnesium deficiency.
In my newbie grow diary, another member suggested that it may be a soil ph problem.
Just wanted to get some more thoughts before I attempt to treat it.

I have a ground soil and tomato potting soil mixed in the pot and I have been watering once a day with water from my koi pond.
The brown patches started about a week and a half ago now but ave got worse and spread, the white spots have only just came up in the past 3 days.
Also it may be nothing as I am trying to trigger flowering while being outside then in a probably sub par tent 12/12, but the centers of the bud producing leaves have thin curled leaves. Is this something to worry about.

Thanks

[Dale92]

Yes calmag should do the trick mate

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[Bulls]

It looks like it. What is the damage on your leaves? You are saying you have the plants outside? Keep an eye for pests!

[JB]

In my opinion that looks nothing like a cal or mag issue but I'll bow to Bulsat's greater knowledge.


In my personal experience a cal def looks like this



And magnesium look like this

[mrjung]

Pic 4 is a bug called leaf miner just squish it, the rest looks to me just water damage (wet drops). Not sure of the last one

[mrjung]

Pic 2 is bug damage too, get a white sheet of paper and shake your plants over the top of it, then you can see what bugs you have easily.

[Bulls]

JD is right and mrjung is right too.On my current grow I have brown patches like yours and I've stopped them with a single feed of Epsom Salts(1 tea spoon dissolved in a 1L lukewarm water). Give them a good drench and increase the distance between the light and the plants for about 1-2 hrs until they dry out(will stop them from burning).
Best thing to do in your case will be to stop getting the plants outside. Keep them in controlled environment. Watch your RH and Temperature. If you're light is too close and you're humidity is too high you might get burn on your leaves again..
I am not familiar with bug problems so I am sure someone will be around to help you. Take a good look on the leaves and do what mrjung said with the white sheet paper.
How old are the plants and under what light are they?
Thanks JD and mrjung for pointing out some obvious problems.

[UkGrowNovice]

Thanks everyone, I will go ahead and buy some calmag however I cannot buy any lights until my payday.
Will leaving it that long harm the flowering or do you think it can make it?

It is 6 weeks old now and it has just been out in my garden the entire time.

I read about trimming roughly and would cutting these leaves off help with the problem or is that going to just harm growing?
Silly questions
I know but at least its lessons learnt for the future.

[UkGrowNovice]

Quick question, the cal/mag that I have ordered is going to be another few days and the leaves are getting worse and its spreading.
I have ph tested my soil very crudely with two samples reacted with white vinegar and sodium bicarbonate, off of this i can see my soil is acidic so in the meantime would it be a good or bad idea to mix some sodium bicarb with water in a low concentration and water with that tomorrow?

More than happy to wait for the cal/mag but i do not want to let the plant get too bad to the point its going to mess up the end result.

Thanks!

[M_C]

Pic 2 & 4 look bug related to me... and I can't really see any issue with pic 5....

Any pics of the entire plant?