Little brown spots all over on different fan leaves

[TheCatman]

I noticed this brown spots starting a few days ago. I've seen it spread through my plant. There's other ones in the tent one of the same strain and to others they don't have any signs of this at all. I wondered if it was a pest issue or a disease. Any experience with this anybody? I was worried it was a disease and I should cut all of those off but I wasn't sure. It's an auto flower of a strain called the muchacha. Here a couple pics. The front two are both muchachas. The back too are Durbin sunrise. Both strains are out of flowers. They are trained simply by tying them over. Obviously that little one got stressed out too much from getting bent over and really went into flowering fast. I really wish I had an option to get these outside at this point. Also does anybody know if you cut off the family that goes to the bud site if there's already leaves coming out from the bud site will they take over and get that spot to continue to grow?
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[AlfaDog]

Did it start on the lower older foliage when you first noticed and is it all the plants have it and are you giving calmag

 

[TheCatman]

Did it start on the lower older foliage when you first noticed and is it all the plants have it and are you giving calmag

It started lower to mid-range. But now it's worked its way up to all the leaves around the flower almost. I wish I would have cut every evidence of it out sooner. If their leaves coming out of the flower will they keep that flower alive or get it to grow any bigger still? Do you know anything about that have you ever cut the family off from the blood site? I have some calmag I can put in it. I gave it a very tiny dose of it a week ago. The plant seems healthy other than the brown spots then eventually the leaf yellows and dies. There are two muchacha Autoflower sisters right next to each other with two Durban Sunrise Auto flowers right behind it. The one went into flowering as soon as I bent it over. The leaves are turning a weird gold and I'm not sure if that's okay or if it got next to the plant with the Leaf Disease. I hope the Bud is still good for smoking from the plant. The short one looks and smells very dank. Buds appear to be green and purple covered with orange hairs. Any ideas of cutting more off of the one with the leaf disease? Do you think I can get rid of it completely and then the other question is do the leaves coming from the flower help the flower grow still or does it need that fan leaf. That little one is beautiful but different parts of it aren't different parts of flowering so that kind of sucks. Also not sure if I should cut the gold leaves out or not

 

[AlfaDog]

I wouldn't pull anything off just yet unless it's going completely dead or almost I'd go with a recommend full strength dose of cal mag since the symptoms started lower older growth and worked it's way up it's most likely a mobile nutrient deficiency and the rust spots resembles calcium and the purpose of calmag is to help the plant in nutrient uptake so if you lack that it leads to other deficiency if you are watering with R/O definatly need to add cal mag and add it first before all other nutrients just as well in coco since it lacks and don't skip any feedings untill it gets better what are your temps at the canopy

 

[steamroller]

Not Ca, by your description, as it often shows in new growth first.

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Calcium deficiencies cause tiny brown spots that appear on new and middle growth. Learn how to fix this problem for good!

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Looks more and sounds more like a potassium deficiency IMO.

How To Fix Cannabis Potassium Deficiency (K) Photos & Chart

Potassium Deficiency Is One Of The Most Common Marijuana Problems, It's Symptoms Appear When The Plant Begins Flowering. Learn How It Looks And How To Fix It.

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