Outdoor plant problem

Hey all, I registered on here because I'm in need of help!

Within the last week my largest plant started spotting (shown in the pictures below). I fed it miracle grow two days ago and the problem still proceeded. I check on my plants today and this problem rised in my second largest plant.

My guess to what this is, is, "insufficient soil aeration". Referenced from http://www.icmag.com/modules/Tutorials/PlantTrouble/Merged.htm
as shown in line 6: 6) Tips of leaves are yellow, brown, or dead. Plant otherwise looks healthy & green. Stems may be soft >> Over-fertilization (especially N), over-watering, damaged roots, or insufficient soil aeration (use more sand or perlite. Occasionally due to not enough N, P, or K. b) If not, go to #7.

OR #3
3) Margins of the leaves are turned up, and the tips may be twisted. Leaves are yellowing (and may turn brown), but the veins remain somewhat green. >> Magnesium (Mg) deficiency. b) If not, go to #4.

Any advice is greatly appreciated. I only posted the pictures of the problem occuring in my largest plant. My next two largest plants are not as severe, although they do have some yellowing spots (i think that is water burn) Thank you for reading!
 

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I hate to post again, but I'm in need of answers.Is this a serious problem? Is it a calcium deficiency, thrips infestation, magnesium issue, soil problem?? or anything serious? Please help!
 

chrishydro

Well-Known Member
I cant answer this but posted to bump up your thread there are a lot of guys here that can.

Here is a chart, I am color blind so cant nail it down but you might see it where I cant.
 
It's a fungal infection. I've received an all natural peppermint & garlic spray to spray on the leaves/stems. I lightly sprayed it 24 hours ago...going to check now to see if theres any advancement with spreading.
 
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