White spots (with a purple dot on a single leaf)

Hey guys, I've been having this issue for a week (or 2, not quite sure). Haven't added any nutes to the soil, i water with a ph of 6.0, the soil itself is said to have a ph of 5.5 to 6.5. I will be transplanting it to the ground in a forest nearby later this after noon (its 1pm now) and i need to know what is causing this before i transplant.
I also checked for mites, can't seem to find those bastards on my plant. I have 2 other plants (1 photo + 1 auto) growing right next to this one and they all look healthy except for this one. It's a Photo Sativa Dom strain in case anyone was wondering.
If anyone knows what the issue is, please reply asap. Thank you

is that chocolate cake mix its planted in?

DonAlejandroVega said:

is that chocolate cake mix its planted in?

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You must be feeling hungry to ask that question haha.
This is the soil i used (All i can find here, in the shitty east):

I mixed it with some good quality red clay at a ratio of 2:1 (1 being the clay of course).

Hxcplayer said:

Edit: Hold that thought for a sec, don't know why the pics are being rotated everytime i post here

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the work of the Prince of Darkness..........he is rampant on RIU.

so..........the foundation of a good grow, is good medium. you broke the first rule. I see zero perlite. I believe you are having drainage issues. re-pot into a better mix.

the white spots may be mildew.
throw that out. start over. I know.........it hurts.
1/3 perlite..........let medium dry/breathe betwixt waterings.

DonAlejandroVega said:

so..........the foundation of a good grow, is good medium. you broke the first rule. I see zero perlite. I believe you are having drainage issues. re-pot into a better mix.

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Most probably, you might be right. I'll go check what they have available in stores. I heard powdered Perlite is the way to go, no chunks or that other bull crap.
Do you think if i added some Perlite to my hole, and transplanted the plant the problem will go away?

DonAlejandroVega said:

the white spots may be mildew.
throw that out. start over. I know.........it hurts.
1/3 perlite..........let medium dry/breathe betwixt waterings.

Click to expand...

Damn, well i don't want to throw it away just incase the problem can be solved. I'll transplant with perlite and keep it for a few days, if the problem persists i'll take it down.

Hxcplayer said:

Most probably, you might be right. I'll go check what they have available in stores. I heard powdered Perlite is the way to go, no chunks or that other bull crap.
Do you think if i added some Perlite to my hole, and transplanted the plant the problem will go away?

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you heard wrong. medium-coarse perlite.
I think that plant has systemic issues, at this point, and should be killed with fire

consider it penance for violation of the "Use Good Medium Rule."