Larry OG - purple stems

[Afgan King]

I mean my larry og does it.....it's a trait of the one I got for sure

 

[Afgan King]

See the purple stems in this pic? This is my Lemon Garlic OG, by the way.

View attachment 3825649

I have like 20 strains in clone form right now that do it lol

 

[ismann]

GH Flora is fine. Just about all my plants I've ever grown had purple stems and never missed a beat.

If the stems are purple with no other visual issues, it is genetic. If it wasn't genetic, you'd get more signs like leaf necrosis if it's a P-def.

 

[ruwtz]

I mean my larry og does it.....it's a trait of the one I got for sure View attachment 3825796

Hits that leaf purpling late on too huh?

After seeing yours I guess i'm going with genetics.

Kinda expected everyone to jump in with Mg def so apologies if I was sharp in my response. Just saying people toss around Calmag as some kind of magic bullet, and often I think it leads to more problems.

 

[Afgan King]

Hits that leaf purpling late on too huh?

After seeing yours I guess i'm going with genetics.

Kinda expected everyone to jump in with Mg def so apologies if I was sharp in my response. Just saying people toss around Calmag as some kind of magic bullet, and often I think it leads to more problems.

Man people gonna always assume some crazy shit. When it comes to something like that u truly only know after growing multiple times. To me your plant looks perfectly healthy I wouldn't worry

 

[Afgan King]

I run colder temps as well but only because your quality goes up. Try 71° day 61° night 35% humidity. Still enrich with co2 if u have it I guarantee you'll love your results

 

[tonygreen]

Calcium and magnesium are two different things, cal-mag is an invention of man and the ratio in bottled "cal mag" is not close to what is found in nature,
I think we severely underestimate how much calcium our plants need. Most cal mag is like 5:1 ideal calcium to mag ratios in nature are much higher.

Everyones gg4 has those red purple stripes, mine always has too, my current run it ran out of them. 1 pound of gypsum per cubic foot of medium.
My gg4 this run does not have leaf "crinkle" either...

What most people think is a mag hog is really a calcium hog... Calcium also has a special relationship with phosphorous.

Calmag leads to more problems because the ratio is off...

 

[ruwtz]

Calcium and magnesium are two different things, cal-mag is an invention of man and the ratio in bottled "cal mag" is not close to what is found in nature,
I think we severely underestimate how much calcium our plants need. Most cal mag is like 5:1 ideal calcium to mag ratios in nature are much higher.

Everyones gg4 has those red purple stripes, mine always has too, my current run it ran out of them. 1 pound of gypsum per cubic foot of medium.
My gg4 this run does not have leaf "crinkle" either...

What most people think is a mag hog is really a calcium hog... Calcium also has a special relationship with phosphorous.

Calmag leads to more problems because the ratio is off...

Whats your preferred method of bumping just Ca? I imagine something like CaCO3 would do the trick, with added benefit of acidifying where necessary (better than pH down), but not run it myself.

You mention Ca:Mg ratios being off in Calmag and i'm inclined to agree. What do you think it should be for our purposes?

 

[ruwtz]

A

Calcium and magnesium are two different things, cal-mag is an invention of man and the ratio in bottled "cal mag" is not close to what is found in nature,
I think we severely underestimate how much calcium our plants need. Most cal mag is like 5:1 ideal calcium to mag ratios in nature are much higher.

Everyones gg4 has those red purple stripes, mine always has too, my current run it ran out of them. 1 pound of gypsum per cubic foot of medium.
My gg4 this run does not have leaf "crinkle" either...

What most people think is a mag hog is really a calcium hog... Calcium also has a special relationship with phosphorous.

Calmag leads to more problems because the ratio is off...

Also, interesting about not seeing leaf crinkle which is so typical with GG4. I'm running this alongside the Larry OG mentioned here and see that crinkle from clone through finish with no perceived defs or other issues.

 

[tonygreen]

I believe the leaf crinkle to be a sign of deformed growth from calcium deficiency, I could be wrong as I often am but I am looking at a 3 foot wide glue without red stems or leaf crinkle at 1 cubic foot gypsum per cubic foot in a soil medium. You can get into further issues with mag, suppose your plant is getting enough mag already? The mag will build up in your soil from not being used and in a few days we dump some more 2:1 on it. Magnesium ions can come into conflict with calcium ions, causing Ca lock-out. It should be noted that P and calcium can lockout mag as well! It's a delicate balance... Leaching becomes very important t prevent build ups. I think 2:1 gets the job done, mostly, but is far from ideal. Especially in our field where so many different cultivars want to be fed differently.

Here is a good paper to read to get ya thinking a bit.

http://www.soils.wisc.edu/extension/pubs/A2986.pdf

I believe we are dealing with a plant that loves calcium even more so than most. I've been seeing better results from 80-85% calcium soil grows than anything closer to 65 produces.
Now that soil testing is so cheap and common it is easier to dial in a medium to a much more exact level. I seen a dude from Hawaii and his naturally like 85% calcium soil... Amazing.

 

[Carolina Dream'n]

Onto second run with Larry OG and I got purple striping of basal stems and purple fan leaf stems all over the place.

Plants absolutely boom in flower and mostly grow out of it, but in veg I get it in every plant every time. It is a very dark red/purple all along the stem and some of the leaf veins too, with the main stem showing purple stripes all the way down.

With less than satisfactory overall leaf health and slightly slower plant growth, I know it must be a problem (I often get some patches of discoloration, crinkling and occasional yellow/brown spotting).

View attachment 3825416 View attachment 3825417

I've read every thread going and think I can cancel out most claims.

>>> Not temps - room is constant 76-78F, low 70's at night;

>>> Not Mg def - I use GH Flora trio + Calmag 3ml/gal every feed (although OG's can be Calmag hogs) + 1/4tsp/gal mg sulfate per week, and no other signs of Mg def such as pale between veins / only affecting older leaves / leaf tips curling up etc)

>>> Not P def - GH Flora trio is well balanced throughout the cycle;

>>> Stable pH and EC strength using RO water

>>> No other environmental stress factor;

>>> Not known to be genetic with this strain.

Setup: growing in 50/50 coco perlite, ebb and flow table fed x3 daily 1.6EC, plants 1 month old, steady RH55%, COB lighting, very healthy and robust roots. Only additives are Hydroguard + Silica Blast + weekly bennie tea.

3 other strains on this table grow fine, with the occasional purple fan leaf stem spotted.


* * *

First run I put it down to stress but this time around they have the good life.

Obviously it is easy to jump on a deficiency here, or a def from lockout. I have tried heavier Mg feeds - up to 5ml/gal Calmag - to no measurable effect.

Perhaps Mg is too high already and locking out P?

Any ideas??

My Lemon Larry OG has purple stems when not acclimated to a light increase and when nitrogen hungry.

 

[ruwtz]

My Lemon Larry OG has purple stems when not acclimated to a light increase and when nitrogen hungry.

Interesting. Is it reasonable to assume a correlation between light levels and N consumption? More light = more nutes is a given, but specifically N?

What would you use to bump N without overferting something else?

I have a sample of pure N somewhere but never used it.

 

[Carolina Dream'n]

Interesting. Is it reasonable to assume a correlation between light levels and N consumption? More light = more nutes is a given, but specifically N?

What would you use to bump N without overferting something else?

I have a sample of pure N somewhere but never used it.

Nah, acclimation and nitrogen deficiency are two different things for sure. The purple stems is probably one of the signs of stress the plant shows.

To answer the other question isn't as simple as just naming a nutrient salt. It has a lot to do with what you are already using as nutrients. Looks like you use the flora series, so I'd probably just add a tad more micro than usual.