Wtf is this!?!

[Seawood]

Just incase someone thinks it’s a P deficiency it’s not.

P is a mobile element. Any deficiencies exhibit there symptoms on lower leaves.

The other first tail tale sign is purple petioles/blueish hue appears to the green leaves

I have researched this phenomenon for 3 years and have not found any solid, scientific explanation as to the cause.

If you are confident in this not being some type of nutrient deficiency, which seems to be too the case, please explain what you think it is.

If this were, in fact, some type of bacterial/fungal/phytoplasma disease, why does it ALWAYS show up within the same time frame every year as the plants transition to flower? If it were some type of insect-transmitted or other disease, the timing of occurrence would be more random and not consistently showing up at a specific time during the plants growth cycle.

 

[Nutty sKunK]

I have researched this phenomenon for 3 years and have not found any solid, scientific explanation as to the cause.

If you are confident in this not being some type of nutrient deficiency, which seems to be too the case, please explain what you think it is.

If this were, in fact, some type of bacterial/fungal/phytoplasma disease, why does it ALWAYS show up within the same time frame every year as the plants transition to flower? If it were some type of insect-transmitted or other disease, the timing of occurrence would be more random and not consistently showing up at a specific time during the plants growth cycle.

Looking back at the photos you can get purple hues by low temperatures.

If it’s not temp related it looks more fungal.

You mean it’s showing up the same time on different strains? Or cuttings?

If all your strains are exhibiting these symptoms my moneys on temps (unlikely) or Bacteria/fungal

 

[Treesomewanted77]

I have some that are showing same signs but we did get a couple nights that the temps dipped down to the mid-high 40’s so just figured it was that but I will try a little extra P in my feed and see if any changes take place other wise I just let it run it’s coarse

 

[Cboat38]

Someone please help me identify this issue. We have had a ton of rain lately and my outdoor plants have this black residue on them.View attachment 4960887
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How low of a temp? I didn’t think low 70s would do this. Got 8 plants outside

Looking back at the photos you can get purple hues by low temperatures.

If it’s not temp related it looks more fungal.

You mean it’s showing up the same time on different strains? Or cuttings?

If all your strains are exhibiting these symptoms my moneys on temps (unlikely) or Bacteria/fungal

I didn’t think low 70s would be cold enough to change purple, but I do have 8 going outside 4 bubba breath,one ppd and one glazed berry, 2 snak. Last week I noticed 3 bubbas breath and the ppd had started to flower so give them some super phos bat guano. Well today the glazed berry, one b.b and one snak had a couple shoots of hue. Maybe they are hungry? I don’t know, as soon as I seen it I looked it up and here I am.

 

[Cboat38]

I don’t know why it posted like that but here’s the shoots didn’t see anything crawling around either

 

[Seawood]

Looking back at the photos you can get purple hues by low temperatures.

If it’s not temp related it looks more fungal.

You mean it’s showing up the same time on different strains? Or cuttings?

If all your strains are exhibiting these symptoms my moneys on temps (unlikely) or Bacteria/fungal

It always shows up as the plants start transitioning to flower. It’s not strain dependant. I’ve had it affect multiple strains over the years. It could be environmental (cold temps at night) but if that were the case, you would think it would be more prevalent later into flowering (September) when the temps really start to drop at night and why would it only affect a few tops/branches if that were the case. Who’s knows. I don’t worry about it and just carry on although I can relate to the panic that a lot of people feel when seeing it for the first time.

Also, if it were some type of fungal disease, why does it only happen at a certain time? As I previously mentioned, the timing should be more random in the case of some form of disease.

 

[Nutty sKunK]

It always shows up as the plants start transitioning to flower. It’s not strain dependant. I’ve had it affect multiple strains over the years. It could be environmental (cold temps at night) but if that were the case, you would think it would be more prevalent later into flowering (September) when the temps really start to drop at night and why would it only affect a few tops/branches if that were the case. Who’s knows. I don’t worry about it and just carry on although I can relate to the panic that a lot of people feel when seeing it for the first time.

Also, if it were some type of fungal disease, why does it only happen at a certain time? As I previously mentioned, the timing should be more random in the case of some form of disease.

It is a bit of a mystery. Do you grow indoors At any point? If so does it effect them indoors?

 

[whatscooking]

I have researched this phenomenon for 3 years and have not found any solid, scientific explanation as to the cause.

If you are confident in this not being some type of nutrient deficiency, which seems to be too the case, please explain what you think it is.

If this were, in fact, some type of bacterial/fungal/phytoplasma disease, why does it ALWAYS show up within the same time frame every year as the plants transition to flower? If it were some type of insect-transmitted or other disease, the timing of occurrence would be more random and not consistently showing up at a specific time during the plants growth cycle.

Only my own experience with this so take it however you want. This exact symptom showed up two years in a row. Plants were growing along doing fine getting close to budding so i thought it would be a good time to add A bloom booster. Started using FF Tiger Bloom. Started using at half strength the got brave going full strength quickly. This blackening showed up with devastating results.
I stopped all supplements and watered vigorously and saw improvements. In my humble opinion I believe it is cuased by over application of unneeded additives.

 

[Porky1982]

Wow this is quite strange. I was thinking it was a genetic thing then when the op said it's only happening to the plants in the ground that makes me think it's something in the soil.

 

[GTG]

So I have the exact same thing on one branch of one plant. None of my others are effected. Everything I've read says phytoplasma. I cut it off and will continue to cut it off until I know it's not disease. It's absolutely not a mold. It doesn't wipe off and it's not purpling from cool temps because it's not that traditional purple but more of a black color. All my research points to phytoplasma.

 

[Hollatchaboy]

Just looks like anthrocyanin imo.

 

[Hollatchaboy]

What's the day/ night temps?

 

[GanjaJack]

I posted this on another thread because they couldn't figure it out there either...

I got laughed at.. But, I don't care. I will stick to it.

I still think it's dew drops, the sun acts like a magnifying glass on the apex meristem, burns the hell out of the center growth. Introduces fungi and kills the plant. Sometimes the plant matures enough to grow out of it. Sometimes, not.

 

[Seawood]

It is a bit of a mystery. Do you grow indoors At any point? If so does it effect them indoors?

I only grow outdoors. Pots and in the ground. Doesn’t seem to matter what soil either. No consistencies other than time of year. I’ve also given cuts of affected plants to friends who grow indoors and they never experienced it so it’s not a genetic thing.

 

[Hollatchaboy]

I only grow outdoors. Pots and in the ground. Doesn’t seem to matter what soil either. No consistencies other than time of year. I’ve also given cuts of affected plants to friends who grow indoors and they never experienced it so it’s not a genetic thing.

What about temps? Any consistency there maybe?

 

[Seawood]

What about temps? Any consistency there maybe?

I always keep a grow log but I don’t record day/night temps so I can’t say one way or the other if that’s a factor. I suppose I could look up historical weather data and compare to when I made notes of it happening to find a correlation but that’s too much work and won’t change anything so kind of futile.

And further to the leafhopper theory, that seems plausible but I had a couple of plants blasted hard by leafhoppers this year and haven’t seen any purpling/weird growth to date. Although maybe only a select few are “carriers” of this theorized disease.

But again, back to the timing argument. There’s a specific window when this starts popping up.