Stems and leaf veins turning red/purple...?

[HomegrownOhighO]

So, both plants I am running right now have started to develop some red/purple stems and veins. They are both Blueberry autos from fast buds. The one is about 2 weeks into flower and outside of the discoloration she looks to be doing relatively well. Now the other one is still not starting to flower so it is in my veg tent by herself. I did do a compost tea last week to get some nutes to them organically but really not sure if they liked it or not? I know that the genetics of blueberry do call for some purple leaves and buds but I also read somewhere that if it's strictly on the stems and leaf veins something is deficient in nutes. However, on the main stalk bud sight a few of the white hairs have turned a dark purple, not sure if that matters or not. I know the hairs do change color of time. What do you all think?

 

[Fromunda506]

That’s a sign that she is struggling to process phosphorus. The kind of burnt looking yellow tips that aren’t really burn are from struggling with potassium. Those are both mobile elements. When they show up at the bottom of the plant and in the older leaves, they are usually just hungry. When you start to see it on the upper part of the plant with healthy leaves at the bottom, it is frequently a lighting intensity issue that is popping those deficiency symptoms in the upper canopy. What is your lighting situation like my friend? I might back them off on the distance or the dimmer just a bit and see if you don’t see some improvement. Good luck. Cheers.

 

[HomegrownOhighO]

That’s a sign that she is struggling to process phosphorus. The kind of burnt looking yellow tips that aren’t really burn are from struggling with potassium. Those are both mobile elements. When they show up at the bottom of the plant and in the older leaves, they are usually just hungry. When you start to see it on the upper part of the plant with healthy leaves at the bottom, it is frequently a lighting intensity issue that is popping those deficiency symptoms in the upper canopy. What is your lighting situation like my friend? I might back them off on the distance or the dimmer just a bit and see if you don’t see some improvement. Good luck. Cheers.

The flowering plant is under the vivosun 200w light at 24" at 40% intensity in flowering mode.
The veg is under the vivosun 100w at 15" at 35% intensity. I've been using the photone app to check ppfd and dli. I adjusted the flowering to just above 500ppfd and the veg at just about 400 ppfd. Keeping the dli between 20-40.

 

[Fromunda506]

Right on. If your lighting is dialed, then it is an uptake issue. She struggling to process phosphorus and potassium. Either there is not enough available or there is something blocking it out. If you are organic, the odds of lockout are pretty low with what you are doing. Process of elimination, I would suggest they are hungry. Their needs for potassium and phosphorus start going up after the first couple weeks of flowering. Sometimes they pick up dramatically vs gradually depending on the plant.

 

[HomegrownOhighO]

What do you mean by dialed on the lighting. So my medium is 50/50 promix and vermiculite with Cali autoflower super soil at the bottom third of a 5 gallon fabric pot. The compost tea was something I just discovered prior to that they have just been getting water and silica. How do I go about getting these girls fed appropriately? Another tea? My tea recipe is blackstrap molasses, worm castings, kelp meal, seabird guano, and alfalfa meal. Brewed for 36 hours with aerator.

 

[HerbalEdu]

here an article you should have a look:

Should You Worry About Purple Or Red Cannabis Stems? - RQS Blog

Seeing red or purple stems on your cannabis plants? Don't freak. Click here for a detailed overview of the causes behind purple or red cannabis stems.

www.royalqueenseeds.com

 

[Zill]

Very good Herbal! I was about to write the same. Lacking PO a plant cannot process the sugars from photosynthesis so it stores the fixed carbon as a carbon dense pigment, like anthocyanins.

I think it’s genetic.

 

[HomegrownOhighO]

Very good Herbal! I was about to write the same. Lacking PO a plant cannot process the sugars from photosynthesis so it stores the fixed carbon as a carbon dense pigment, like anthocyanins.

I think it’s genetic.

I mean, it's living soil and with the compost tea I would assume it has everything it needs

 

[DR.PNW]

I mean, it's living soil and with the compost tea I would assume it has everything it needs

Never assume in science.
Take measurements and listen to your plant.
Flowering plants are hungry and not all "no-feed" soils are built the same.
Feed it some PK Spike alongside a vitamine B product to reduce the stress it has gone through,
making sure you get a healthy amount of run-off,
and you should see it bounce back on track pretty quickly.
Vitamin B plays a major roll is de-stressing, just as it does in human biology.
Sometimes in these cases the deep colouring can be solely caused by stress.
Note: pH imbalances can block out specific nutrient uptake.

 

[HomegrownOhighO]

Never assume in science.
Take measurements and listen to your plant.
Flowering plants are hungry and not all "no-feed" soils are built the same.
Feed it some PK Spike alongside a vitamine B product to reduce the stress it has gone through,
making sure you get a healthy amount of run-off,
and you should see it bounce back on track pretty quickly.
Vitamin B plays a major roll is de-stressing, just as it does in human biology.
Sometimes in these cases the deep colouring can be solely caused by stress.
Note: pH imbalances can block out specific nutrient uptake.

View attachment 2102948

This is happening to my veg plant too. I checked the soil pH yesterday and it was in-between 6.5-7.0. Any recommendations for PK spike?

 

[DR.PNW]

This is happening to my veg plant too. I checked the soil pH yesterday and it was in-between 6.5-7.0. Any recommendations for PK spike?

No PK for veg.
Standard growth fertilizer should be enough.
Pk Spike by Green Planet is a great liquid PK, a cost effective powder would be Big Bud, Monster Bloom, Bud Blood, etc.
Organic PK would be more commonly a premixed top dress bloom food [1-9-5, or similar].

I suspect there is a stressor causing your plant to darken unreasonably.
Find the stressor and use B Vitamin to help recovery [Vitathrive is great, as is ThriveAlive].
The soil pH is on the high end but not enough to cause pH lockout.
Check your 30% run off PPM; 800-1200 ideal [strain and climate dependent].

Note: this could also simply be credited to genetics and could potentially be either; normal, or caused by a genetically predisposed sensitivity.

 

[Zill]

Hey Dr.,

How do you think a plant picks up vitamin B? Plants synthesize all vitamin Bs. There is zero benefit of adding exogenous vitamin B. What do you think the half life is of vitamin B in the soil? Regarding uptake the plant has no mechanism to transport vB into a root.

Zill.

 

[Oldchucky]

Damn! All these decades of using vitamin B1 for transplant, shock has just been baloney! What a marketing coup!

 

[HomegrownOhighO]

No PK for veg.
Standard growth fertilizer should be enough.
Pk Spike by Green Planet is a great liquid PK, a cost effective powder would be Big Bud, Monster Bloom, Bud Blood, etc.
Organic PK would be more commonly a premixed top dress bloom food [1-9-5, or similar].

I suspect there is a stressor causing your plant to darken unreasonably.
Find the stressor and use B Vitamin to help recovery [Vitathrive is great, as is ThriveAlive].
The soil pH is on the high end but not enough to cause pH lockout.
Check your 30% run off PPM; 800-1200 ideal [strain and climate dependent].

Note: this could also simply be credited to genetics and could potentially be either; normal, or caused by a genetically predisposed sensitivity.

I hear everything you are saying and I am taking it in but I am started to lean towards genetics because looking at the girls today it is almost every stem is turning purple, even on the plant in veg and they are both Blueberry. I have not been watering until run off because of the living soil, I did water until runoff at the beginning but advised not to water until runoff with the living soil. I have been watering every 3-4 days exactly half gallon at a time but I don't water again until the top 2-3 inches of the soil is dry and I also pick them up checking the weight. My veg plant seems happy and thriving but the flowering plant looks sad about half way down. Although, the flowering sites are a little more dense every day. Just haven't seen much growth since she started to flower. Maybe an inch or two in the past couple weeks.

Note: These girls were stunted a little due to a late transplant but they bounced back real nice just haven't seen much linear growth once it started to flower. The veg plant is getting taller almost as tall if not taller now than the flowering plant.

 

[Zill]

Chucky,

All good. This field is filled with urban legends and false claims. It’s tough. But remember these fools are not trying to help. They make their shit sound incredibly complex. Later you think you cannot live without it.

BS.

Chucky rocks!

Zill.

 

[DR.PNW]

Damn! All these decades of using vitamin B1 for transplant, shock has just been baloney! What a marketing coup!

Regarding Vit B: Try using it and you will see direct results in a scenario where it is in need.
I have many clients that have thanked me for turning their vegetative crops around by suggesting the use of Vit B.
Don't lose hope in proven science over the word of folks on the internet.

 

[DR.PNW]

I hear everything you are saying and I am taking it in but I am started to lean towards genetics because looking at the girls today it is almost every stem is turning purple, even on the plant in veg and they are both Blueberry. I have not been watering until run off because of the living soil, I did water until runoff at the beginning but advised not to water until runoff with the living soil. I have been watering every 3-4 days exactly half gallon at a time but I don't water again until the top 2-3 inches of the soil is dry and I also pick them up checking the weight. My veg plant seems happy and thriving but the flowering plant looks sad about half way down. Although, the flowering sites are a little more dense every day. Just haven't seen much growth since she started to flower. Maybe an inch or two in the past couple weeks.

Note: These girls were stunted a little due to a late transplant but they bounced back real nice just haven't seen much linear growth once it started to flower. The veg plant is getting taller almost as tall if not taller now than the flowering plant.

Watering without run-off takes a high level professional approach involving regular soil samples testing for micro/macro elements.
Less run-off in living soil is okay, but should still be at least 10% if your mixture is porous enough, ie. contains enough drainage medium, perlite etc.
30% run-off will give you the most accurate results when testing run-off for pH/PPM.

**I believe you are of the right mind that your genetics are more colourful, but try not to rule out anything else without some effort and trial**

 

[Zill]

Think about it Dr., it’s not proven science. Send me the ordinal research articles that demonstrate exogenous Vitamins, VBs, actually cause a beneficial effect. If you add this stiff and believe it works then use it. It does nothing. Have you Dr., performed controlled plant growth experiments with good controls and decent analytics to demonstrate the benefit. No.

 

[HomegrownOhighO]

Watering without run-off takes a high level professional approach involving regular soil samples testing for micro/macro elements.
Less run-off in living soil is okay, but should still be at least 10% if your mixture porous enough, ie. contains enough drainage medium, perlite etc.
30% run-off will give you the most accurate results when testing run-off for pH/PPM.

**I believe you are of the right mind that your genetics are more colourful, but try not to rule out anything else without some effort and trial**

I'm not, I'm picking up what you're putting down. Just not sure where to start here. I'll probably have to water on Wednesday. I used 50/50 promix and vermiculite, plus in the very bottom I put a layer of rocks for drainage before filling the pot with dirt. Will the run off give me a more accurate measurement of the soil when testing pH? Right now I'm just using a soil test kit to test soil pH. I have a probe but I don't trust it, it's cheap from Amazon.

 

[DR.PNW]

Think about it Dr., it’s not proven science. Send me the ordinal research articles that demonstrate exogenous Vitamins, VBs, actually cause a beneficial effect. If you add this stiff and believe it works then use it. It does nothing. Have you Dr., performed controlled plant growth experiments with good controls and decent analytics to demonstrate the benefit. No.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9544542/

Happy growing Zill.