Light/Heat stress?

About 3 weeks ago she started showing crispy leaves; thinking back that is also about the time I switched from 18/6 to 20/4 and started giving 2L of water instead of 1-1.5. The lower leaves look ok, but anything above the middle look bad... All plants are fed the same, yet green crack is the only one having issues like this. She's About 18-20 inches from the light. The only thing different is the other girls get 2L of water each time, and green crack was getting 1-1.5L then I started giving 2L.

The only other thing I can think of is that they all started to show deficiency so I Fed with seaweed and kelp fert. The other girls got healthier, green crack got worse; so maybe flush with tap? Ph'd tap? RO?


Light: SF1000
Temp: average 68 lights off, 78 lights on
RH: average 40%

Looks nitrogen deficient. Why are all the leaves soaking wet? Looks like you got powdery mildew in the last picture. Don't foliar water like that unless you have superior airflow. Will cause mold issues especially in late flower.

Southside112 said:

Looks nitrogen deficient. Why are all the leaves soaking wet? Looks like you got powdery mildew in the last picture. Don't foliar water like that unless you have superior airflow. Will cause mold issues especially in late flower.

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That is the water. I sprayed about 30 seconds before I took the picture. The airflow is no problem, they are dry within 2-3 minutes.

cirE said:

That is the water. I sprayed about 30 seconds before I took the picture. The airflow is no problem, they are dry within 2-3 minutes.

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How much are you feeding? What is your ec or ppm? Again looks nitrogen deficient to me. Plants use a lot of N during early flower/stretch.

Southside112 said:

How much are you feeding? What is your ec or ppm? Again looks nitrogen deficient to me. Plants use a lot of N during early flower/stretch.

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I dont have a ppm meter, so I need to get one so I can check. I am doing water, water, water/fish and kelp fert or water, water/fish and kelp fert depending on how dry the plants are. I water between every 2-3 days. Im using Kellogg's Fish and Kelp with molasses 2-2-2.

It says feed 1tbsp per gallon 1-2 times per week. With the way I have it, im only feeding about every Wednesday/Thursday.

cirE said:

I dont have a ppm meter, so I need to get one so I can check. I am doing water, water, water/fish and kelp fert or water, water/fish and kelp fert depending on how dry the plants are. I water between every 2-3 days. Im using Kellogg's Fish and Kelp with molasses 2-2-2.

It says feed 1tbsp per gallon 1-2 times per week. With the way I have it, im only feeding about every Wednesday/Thursday.

Kellogg Garden Organics Fish & Kelp Fertilizer with Molasses

Our Fish & Kelp Fertilizer will help your annuals, fruits, herbs & vegetables produce larger blossoms, a more bountiful harvest with more lush foliage.

www.kellogggarden.com

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Fish and kelp is not an adequate complete nutritional regimen. You need a complete nutrient regimen like the general hydroponics trio unless you have a organic super soil.

Southside112 said:

Fish and kelp is not an adequate complete nutritional regimen. You need a complete nutrient regimen like the general hydroponics trio unless you have a organic super soil.

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I was doing a water only grow and then I needed to supplement. I have new super soil cooking right now for my next grow. For now im just trying to get these to finish while my super soil cooks.

cirE said:

I was doing a water only grow and then I needed to supplement. I have new super soil cooking right now for my next grow. For now im just trying to get these to finish while my super soil cooks.

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Get some gh trio to help you finish this grow. Good luck.

So N def? If thats the case Ill just go and get some fish emulsion 5-1-1 to finish this. I dont want to buy synthetic ferts just to finish these; im trying to go organic

cirE said:

So N def? If thats the case Ill just go and get some fish emulsion 5-1-1 to finish this. I dont want to buy synthetic ferts just to finish these; im trying to go organic

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The N deficiency was a result of not having enough N during stretch. Now that stretch is over you need more P & K as opposed to N. Get a bloom fertilizer if anything. Still recommend a balanced npk like gh trio for best results.

What about top dressing with Dr. Earth's Flower Girl? My local store has that and I really dont want to spend $40 just to finish up this plant and never use the trio again. I will use Flower Girl in the future too

cirE said:

What about top dressing with Dr. Earth's Flower Girl? My local store has that and I really dont want to spend $40 just to finish up this plant and never use the trio again. I will use Flower Girl in the future too

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That should help but again, without a complete nutrient regimen such as proper super/organic soil or bottled nutes you are going to get sub par results.

cirE said:

So N def? If thats the case Ill just go and get some fish emulsion 5-1-1 to finish this. I dont want to buy synthetic ferts just to finish these; im trying to go organic

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People think I'm an asshole when I suggest not to grow completely organically unless you have a firm grasp on soil science, but this is a perfect example of why I say this. Why don't you want to buy synthetic ferts?

PJ Diaz said:

People think I'm an asshole when I suggest not to grow completely organically unless you have a firm grasp on soil science, but this is a perfect example of why I say this. Why don't you want to buy synthetic ferts?

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Its not being an asshole, it's completely true. Im totally at fault for jumping in without researching enough! Ive been fighting going witty synthetic ferts Because I am trying for simple as possible. Though until i get a good grasp, a trio may be the simplest way.

cirE said:

Its not being an asshole, it's completely true. Im totally at fault for jumping in without researching enough! Ive been fighting going witty synthetic ferts Because I am trying for simple as possible. Though until i get a good grasp, a trio may be the simplest way.

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A complete one-part nutrient is the simplest. Don't get me wrong, I'm all for organics, but mostly for the lack of pesticides. While I also appreciate that runoff from large scale farms which use synthetic nutrients can be bad for the environment, I'm not concerned about small hobby growers causing environmental issues with a bit of synthetic nutes.

PJ Diaz said:

A complete one-part nutrient is the simplest. Don't get me wrong, I'm all for organics, but mostly for the lack of pesticides. While I also appreciate that runoff from large scale farms which use synthetic nutrients can be bad for the environment, I'm not concerned about small hobby growers causing environmental issues with a bit of synthetic nutes.

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Something like one part mega crop? Or maxigrow and maxibloom?

edit* Actually thats probably more work figuring out whats wrong.. Maybe its best to just get liquid fert.. My wife is going to hate me for spending so much for all this lol. I dont think its a lot - but she doesnt smoke so she hates that I keep buying things lol.

cirE said:

Something like one part mega crop? Or maxigrow and maxibloom?

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Yep, or Hydroponics Research Veg+Bloom.

Tell your wife it's less than you would spend on buying weed.