Lighting What about light stress with too much Autocob goodness?

[Savage Garden]

Its not light stress,

add nutes

My T Diff with plenty of nutes

miracle grow has plenty of N

 

[AutoWonders]

My T Diff with plenty of nutes

Those are some "long" pistils

 

[Savage Garden]

Thats with a 600w hps about 16 inches away.


This is probably light stress

 

[lunarman]

Assumption is the mother of all f*ck ups!

True you big hippy mofo. The interesting part of growing weed, if you are in to this, is there are many areas where a newbie can make a lot of fucked up assumptions. It is kind of scary to me, and frustrating, but also so challenging and to me almost like an addiction. I just want to learn, make an improvement, and over and over.

 

[lunarman]

Its not light stress,

add nutes

My T Diff with plenty of nutes

miracle grow has plenty of N

That is a nice plant. Looks like you keep your RH pretty high. Is that right?

I have 2 more TD beans thankfully. Once this plant is done I'll being doing another one right away. Hopefully I get things sorted before then and grow one that is on par with yours and the others I've seen. They are impressive plants when done right.

Not giving up on mine just yet. my autopots res for flowering is about empty so I'm going to reload it and jack up the nutes to 1.5 times what I was using. And the single COB has been raised too. Covering all bases. Mine might not fully recover at this point and turn back to proper color, but hopefully I get a decent harvest from her.

 

[Hippy_BiotabsF70]

True you big hippy mofo. The interesting part of growing weed, if you are in to this, is there are many areas where a newbie can make a lot of fucked up assumptions. It is kind of scary to me, and frustrating, but also so challenging and to me almost like an addiction. I just want to learn, make an improvement, and over and over.

Oh man I've made most of them and still do! Lol! Keeps me happy though. Try it, if its good do it again, if its shit don't do it again and try not to tell anyone you did it!

 

[Heliman]

Tell me what does that cob light stress look like? Just curling/tacoing? No color change? Bleaching?

Thanks for chiming in man. Its stressful when you see something wrong with a plant and you take pictures and provide info and everyone has a different opinion on what is wrong. I hate the mysterious plant issues!!!!

Hey guys,

I have been trying to get to grips with light/heat/nute stress for some time nw, because of the hard conditions under which I grow my girls (temp from 18 to 44, day length less than 11, PPFD at best 295) and that is a pretty severe set of parameters, and yet with careful use of nutes/ water/PH/EC I get a reasonable yield.

What I am beginning to understand is that light stress as such does not exist, water and nute and temperature stress does !!!!!

I read that as more and more light (photons per sq cm) pour onto the plant, photoinhibition occurs, the plant simply shuts down. The shut down is point is heavily influenced by available CO2...more light can be tolerated if CO2 levels are artificially raised.

At these extreme light levels the plant is on a knife edge and probably will be more severely affected by any other imbalances (water, nutes, temp) existing....so it all gets a bit marginal.

I dont pretend to fully understand the physics or the botany in this arena, but it makes for interesting thoughts on the management of light, namely it would be best to manage all the other parameters first, the plant seems to already have some inbuilt mechanisms to deal with light excess, but cant really cope with serious imbalances in the other parameters...Leibig's Minimum Law at work ????

 

[BigSm0]

This is the best thread on all of Afn. So much to consider but I do think most of the main points were mentioned. @hippy71 nailed it on page one. You shouldn’t run a 3k hp big block on 87 octane. Hope that made sense as I’m not a car guy lol. Or how about this, teenagers and how much food they can devour per day. That growth spurt needs fuel like our plants do. I am have battled nutrient issues since my first grow and still do a little to this day. The plants that grow in perfect health are either not being pushed as hard or are from a grower with a lot more experience than me. I just bought a 100 dollar bottle of mammoth to help with my phosphorus deficiencies, guess what. I have a phosphorus deficiency this run too. I’m not going to blow them up to much just yet but this megacrop nutrient has really caught my attention as it seems to be the savior we all need. Autos are MUCH more difficult to grow. They grow so fast and I think they are more sensitive too. Give them the wrong thing or have a small ph swing and it’s game over. No correction needed cause it’s not going to change much. Strain, lights, nutrients. The first 2 are easy, the third haunts us. As far as the picture goes on page one the yellowing is at the bottom of the plant. That’s a mobile deficiency I believe. The plants drawing nutrients from the lowest less important leaves to feed the top ones. To me this means they aren’t getting what they need from the root zone.

 

[Hippy_BiotabsF70]

This is the best thread on all of Afn. So much to consider but I do think most of the main points were mentioned. @hippy71 nailed it on page one. You shouldn’t run a 3k hp big block on 87 octane. Hope that made sense as I’m not a car guy lol. Or how about this, teenagers and how much food they can devour per day. That growth spurt needs fuel like our plants do. I am have battled nutrient issues since my first grow and still do a little to this day. The plants that grow in perfect health are either not being pushed as hard or are from a grower with a lot more experience than me. I just bought a 100 dollar bottle of mammoth to help with my phosphorus deficiencies, guess what. I have a phosphorus deficiency this run too. I’m not going to blow them up to much just yet but this megacrop nutrient has really caught my attention as it seems to be the savior we all need. Autos are MUCH more difficult to grow. They grow so fast and I think they are more sensitive too. Give them the wrong thing or have a small ph swing and it’s game over. No correction needed cause it’s not going to change much. Strain, lights, nutrients. The first 2 are easy, the third haunts us. As far as the picture goes on page one the yellowing is at the bottom of the plant. That’s a mobile deficiency I believe. The plants drawing nutrients from the lowest less important leaves to feed the top ones. To me this means they aren’t getting what they need from the root zone.

Thanks mate. And that is one of the best analogies on AFN dude! Big block running lean on 87 octane ditch water, is exactly like a plant running lean on not enough nutes! Also applies to an unmapped engine running rich on 105 race fuel, and a plant in N tox due to too much food. Awesome.

I agree autos are more sensitive also. Like a high maintenance girlfriend, or while we're at it, an old italian sports car?

And as for the statement previously that light stress doesn't exist....... check out those white tops on the same page the fella that said that!

All just IMO as always

 

[Hippy_BiotabsF70]

I think with autos the best bet is to put the cobs higher than you think probable, and leave them there for the whole grow. I personally don't think cobs need to be less than 2 feet away even at full flower mode. In veg they should be way higher according to my personal experience.