Hell yeah brother the plants flourished after everything I did to them record plants this year !
You already know I wouldn’t use any soil other then this…this is what I aided to the plants through the grow after purple showed up
Lime
Calcium amendment .
Calcium spray made from eggshells and vinegar
One and done spray for bugs
Flower kiss foliar spray
2 weeks into flower stopped all foliars
I think next year we will deff be better prepared !
Hope all is well brother
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That’s a good experiment 
, thanks for trying and willing to see the results … 
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@jimihendrix1942 , maybe look at this one.
Its not the soil. We use Promix BX, and Native Soil, Living Soil, and it happens in all 3. Ive been growing weed for 51 years, ( 1972 ) and until the last 10 years, NEVER had this happen.
I can use the same medium, and clones/seeds inside, and it never happens. As in NEVER.
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So…
This happens to my plants from time to time. My yard is ripe with all sorts of leaf hoppers. What I can say for sure is that I first noticed this stuff on a Valerian officinales plant. So the valerian had this affliction for several seasons in a row and was also fed on by leafhoppers and aphids and other bugs too, weird little slime larvae that turn into red beetles. The valerian I tore out and forgot about. A couple years later I put a cannabis plant in a 10 gal pot in brand new out of the bag Roots OG soil with some amendments. The cannabis plant after about a month had the same purple ink blot affliction the valerian that grew there had. The cannabis plant was in a pot in new soil and not in contact with the ground there.
I suspect that indeed it is a “disease” caused by insects. I have inspected the cells under a microscope and see no filamentous fungi of any type. Botrytis of any species is visible as filamentous material. My vote is bacteria. It acts like bacteria and tends to happen after moisture and temperature swings but is always synonymous with rain/most leaves, leafhopper activity, and lack of daylight hours of direct sun.
I have noticed that if I snip off the affected material, bump up the nutrition, and move plants to sunnier locations, the issue resolves and new growth doesn’t display the issue. Unchecked it tends to take over about 70% of the plant and really hampers growth of flowers. The same plant will have fugly purple blotches and other branches with perfect buds. Deficiencies, lockouts, and excesses don’t do that.
I am going to try treating a plant this season with some home grown Pseudomonas fluorescens bacteria. It is a deep dive on that one which I digress, but I think a drench might help. I regularly find P. fluorescens in the mucous of leafhopper and froghopper larvae colonies (I’m sure there is a fancy term for spitbugs). I have ones that I sourced/captured from wild insect eating fungi though, which are not detrimental to plants and tend to out compete most other strains of pseudomonas. This particular pseudomonas fluorescens is a fovored food of every amoeba I have thrown at it and they are attracted to it over pretty impressive distances. A lot of thos same amoebas are clean up crews for whatever other bacteria are present.
Anyway… This purple inky looking shit is interesting.!
A couple pics of various pseudomonas infections in plants, taken from the web.
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Awesome info, thanks for sharing … 
Leaf Hoppers didn’t cause the purple blotching in my plants. I grew them in straight composted horse manure and had severe phosphorus lock out caused by the Calcium deficiency in the horse manure. The first year it happened I got no buds at all. The next year I grew the plants in a different location but put lots of horse manure in the soil and ended up with the purple blotches again. I went online and discovered hydrated lime was a fix so I applied the lime and within 10 days the problem was gone. The next year I grew in containers and some plants were heavily amended with Horse manure and only these got the purple blotches. Since that time I have stopped amending with the horse manure at planting time and I no longer get purple blotches. I still use the horse manure, but I put it into my mix a year in advance. The manure is between 15-30 years old. I have wondered if there is some sort of antibiotic used on the horses which would go along with the bad bacteria idea I’d guess. I had used horse manure for 25 years before from different sources and never had an issue with it. This manure was gathered from the open Horse Pen where it was constantly turned into the soil. The manure I used that caused the problems was in a massive pile probably mixed with straw and maybe some sawdust, and was certainly anaerobically composted. Very dense, loaded with fungi. Horse manure is notoriously low in calcium and without calcium the plant cannot uptake phosphorus. I still have lots of leafhoppers. No issues.
I also wondered if perhaps the fungal dominance of the soil caused it to take a nosedive pH wise and thus the lockout.
About 10 years ago I put some of the buds in a baggie and I think I still have it in the barn in a box. I’ll get a picture of it if I can. Basically there was no bud at all just resinous leaf that was all twisted and messed up looking
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Obviously boron deficiency 
What @Upstate said is correct !
Trail and error with calcium the plants improved sufficiently !
Calcium foliar spray hydrated lime early on and calcium increase deff helped
Read the thread from the beginning
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The hydrated lime and calcium protocols working to “fix” the problem just fan the flames of bacterial wilt of some kind in my mind. I did read the thread.
I’ve grown thousands of cannabis plants in many environments, some very poor or toxic, and I’ve dealt with just about every lockout, deficiency, toxicity, disease, and pest under the sun. This purple stuff is interesting because I can grow the same clones in the same brand new soil right out of a bag, ammend with phos guano, oyster shell, azomite, kelp, and frass, and the indoor plants don’t have the same problem but plants outside do. The only difference is the bugs. Also various species of plants will get this same disease here, not just cannabis. It is never every plant of the type either, nor is it ever the whole plant unless the plant is in the shade. There will be healthy branches next to purple branches on the same plant even. That is pretty typical for a lot of bacterial wilts.
I mean I get the draw to just figure out what bandage works but I get giddy when I meet new bacteria. I love bacteria.
I have a plant doing this right now. It was feasted on by leafhoppers a week or two ago which tapered off by now. The purple is just starting. If it is a pseudomonas I have no doubt I can capture an axenic culture to play with and start throwing plant safe competitors at it.
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Please share pics of those affected plants …
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keep us posted!
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I’m deff interested as well !
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Not my plant/photo, but weve been battling this for at least 12 years. Have grown since the 70s, and never had this happen.
While of course I may be wrong, but I believe it is a Phytoplasma, mainly caused by Leafhoppers, but, other bugs that chew, can also transmit it. from what I understand, the Phytoplasma, can over winter in Elm Trees, and then is passed to insects, which then chew on your plants. Sometimes they grow out of it, most often they dont.
One person on another forum, says with conviction, that it is Witches Broom. But, Ive yet to see any photos on the internet, with a plant with witches broom, being purple. Its all other kinds of fucked up, but so far, in several years, Ive yet to see a plant with confirmed witches broom, be purple. Not saying it doesnt happen, just Ive never seen evidence of it.
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I would like to say that the plants this showed up on last year all grew through it. I am seeing it on 2 plants currently. I sprayed Garden Friendly Fungicide last year and am about to do it again this season. I’m not snipping anything off yet. I am going to try just the fungicide this year.
I never got any lime yet 
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Here’s the situ in pics
That’s a Freak Genetics Sassparilla. I have another one out there and it has no issues. They are about 40’ apart. I also have one InHouse Dracula showing this issue and one that does not. These are all cuts with each strain being identical. I’ll update their fate as it happens. Treating with Garden Friendly Fungicide right now.
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Great post. I was absolutely perplexed by this in the few outdoor seasons I had. Chalked it up P def due to soil conditions, but in hindsight, plants in the ground as well as plants above ground in bags developed it as well and seems could be some other environmental factor.
Same, but my plants definitely seemed impacted a bit and one I culled as stunted. I’d like to see what impact the fungicide will have in quelling the symptoms.
This problem, septoria, pm, critters, and planes all had me retire the outdoor garden, but I’d like to try greenhouse growing and IPM still a concern there. Anyway, following the discourse.
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Same here. I am taking a more structured approach just to see if this actually works. I’ve been spraying GFF every other day and I’ll try and take pics weekly to see if there is any progress.
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I got this same shit all over my garden, daconil helped but i cant use it now that they’ve started flowering. Anyone got a cure for this? My soil is not the issue and fungicide definitely helped but it spread from one plant for sure. Some are completely unaffected, others are blotchy and one is probably getting culled its so bad.
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OK, I had varied success with the fungicide. Here is the same cola that was treated with Fungicide. It seems that the dark colors were knocked back and it grew through it.
I left some colas untreated and those are much more purplish still. Overall there definitely seems to be some effect from the fungicide. I’m missing the pics of the control colas that were not treated but I’ll get those later. Another observation I’ll make is that the plant’s growth was not really up to normal speed…but there definintely normal looking bud there…just smaller. Not sure if the reduced size is because of the affliction or the treatment.
I also treated a Dracula and that plant had a lighter infestation/or whatever, and treated overall. Again maybe smaller than usual but looks way better than what I thought I’d get. I’ll see if I can find some early pics on that for a comparison too.
Modus operandi at this point is to spray that fungicide as soon as I see the purple crap.
Not genuinely scientific but to me the fungicide appears to have helped.
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