Seedling's starter leaves/cotyledons tips are turning yellow

DjSuperman

DjSuperman

Member
Strain: Gorilla Glue #4 Auto-flowering feminized
Age: 1.5 weeks
Light: 22 watt LED grow light @ 3000 lumens, 12 inches above plant, inside of a cardboard box with a Mylar emergency space blanket for reflection.
Circulation: AC Infinity MULTIFAN S5, Quiet Dual 80mm USB Fan
Pot: 3 inch DollarTree pot inside of a Solo cup, wrapped in aluminum foil
Watering Schedule: Everyday to Every other day because the soil dries out quickly

So this is my first time growing, I have been giving my seedling nothing but water ever since it sprouted, with 24 hours of light.

I am also growing it in "Miracle-Gro Nature's Care Organic & Natural Potting Mix with Water Conserve" which has Alfalfa Meal, Bone Meal, Earthworm Castings, and Kelp Meal in the soil. The soil is 0.15-0.13-0.15 NPK.

2 days ago, I watered it with 1/2 of a teaspoon of Alaska Fish Emulsion in 1 gallon of water, which is 1/4 of the full strength, which is supposed to be 2 teaspoons in 1 gallon of water. And the NPK is at 5-1-1.

Today, I noticed that the tips of the cotyledons aka first set of leaves are turning yellow.
The 2 sets of true leaves still looks green and healthy tho.
I am not sure if the cotyledons are getting ready to fall off, or if I just burnt my seedling with fertilizer.
If I burnt it with fertilizer, what should I do?

I am also planning to water it with Seed Sprout Tea, made from corn, and mungbean sprouts today or tomorrow. Do you guys think it's a good idea?

As you can see in the pictures, the true leaves looks dark green, while the starter leaves/cotyledons looks pale green/yellowish.
IMG_20190221_110623_2.jpg IMG_20190221_110707.jpg

Normal lighting
IMG_20190221_122458.jpg IMG_20190221_122441.jpg
 
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DjSuperman

DjSuperman

Member
hotrodharley said:
Raise the light! Way too close.
Click to expand...
How high do you think I should raise the light?
It get's SUPER bright inside of my closet, like brighter than the ceiling light in my bedroom, since I haven't set up my grow tent yet. I am basically hiding the light with a box, a towel, and clothes hanging in my closet.
I'm basically just laying the light on top of the box, as like a cover, with a little bit of space for air flow at the top, but it is about 10 to 12 inches away from the top of the plant....

I mean, the light is only 22 watts tho @ 3000 lumens. I heard that I needed 2500 lumens per square feet. I haven't even used my 2nd 22 watt LED light yet, which would equal 6000 lumens per square feet combined.

I bought a 200 watt LED which equals 3000 watts MH/HPS Lights, but websites have said that the leaves will get bleached, so I returned it for a 100 watt LED which would be equal to a 1500 watt Metal Halide/HPS Light.
At what stage should I start using my 1500 watt LED light?
 
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hotrodharley

hotrodharley

Well-Known Member
DjSuperman said:
How high do you think I should raise the light?
It get's SUPER bright inside of my closet, like brighter than my ceiling light, since I haven't set up my grow tent yet. I am basically hiding the light with a box, a towel, and clothes hanging in my closet.
I'm basically just laying the light on top of the box, as like a cover, with a little bit of space for air flow at the top, but it is about 10 to 12 inches away from the top of the plant....

I mean, the light is only 22 watts tho @ 3000 lumens. I heard that I needed 2500 lumens per square feet. I haven't even used my 2nd 22 watt LED light yet, which would equal 6000 lumens per square feet combined.

I bought a 3000 watt LED, but websites have said that the leaves will get bleached, so I returned it for a 1500 watt LED.
At what stage should I start using my 1500 watt LED light?
Click to expand...
Check this article out.

https://ledlightsnation.com/tips-on-growing-marijuana-indoors/
 
DjSuperman

DjSuperman

Member
I would like to get a second opinion,
Because you did not address the issue of nutrient burn at all.
I mentioned that I fed the plant Fish Emulsion 2 days ago, and the leaves started turning yellow.
The light has always been the same....
Fish Emulsion is an organic fertilizer so it works slower than synthetic fertilizer.

I think if the tips were getting bleached, then it would happen to the entire plant, and not just the starter leaves?
 
hotrodharley

hotrodharley

Well-Known Member
First you are feeding a plant that doesn't need to be fed. You can't do anything about that but to not do it again. However your light distance is too close and you CAN do something about that.
 
B

Beachwalker

Well-Known Member
DjSuperman said:
Strain: Gorilla Glue #4 Auto-flowering feminized
Age: 1.5 weeks
Light: 22 watt LED grow light @ 3000 lumens, 12 inches above plant, inside of a cardboard box with a Mylar emergency space blanket for reflection.
Circulation: AC Infinity MULTIFAN S5, Quiet Dual 80mm USB Fan
Pot: 3 inch DollarTree pot inside of a Solo cup, wrapped in aluminum foil
Watering Schedule: Everyday to Every other day because the soil dries out quickly

So this is my first time growing, I have been giving my seedling nothing but water ever since it sprouted, with 24 hours of light.

I am also growing it in "Miracle-Gro Nature's Care Organic & Natural Potting Mix with Water Conserve" which has Alfalfa Meal, Bone Meal, Earthworm Castings, and Kelp Meal in the soil. The soil is 0.15-0.13-0.15 NPK.

2 days ago, I watered it with 1/2 of a teaspoon of Alaska Fish Emulsion in 1 gallon of water, which is 1/4 of the full strength, which is supposed to be 2 teaspoons in 1 gallon of water. And the NPK is at 5-1-1.

Today, I noticed that the tips of the cotyledons aka first set of leaves are turning yellow.
The 2 sets of true leaves still looks green and healthy tho.
I am not sure if the cotyledons are getting ready to fall off, or if I just burnt my seedling with fertilizer.
If I burnt it with fertilizer, what should I do?

I am also planning to water it with Seed Sprout Tea, made from corn, and mungbean sprouts today or tomorrow. Do you guys think it's a good idea?

As you can see in the pictures, the true leaves looks dark green, while the starter leaves/cotyledons looks pale green/yellowish.
View attachment 4286804 View attachment 4286805

Normal lighting
View attachment 4286828 View attachment 4286829
Click to expand...
You're feeding seedlings in Miracle Grow soil..!? step back because the plants going to ignite very soon (what I'm saying is stop feeding it for starters) also those LED equivalency numbers are fake
 
DjSuperman

DjSuperman

Member
Beachwalker said:
You're feeding seedlings in Miracle Grow soil..!? step back because the plants going to ignite very soon (what I'm saying is stop feeding it for starters) also those LED equivalency numbers are fake
Click to expand...
I don't think the LED Equivalency is fake bro.
I have seen 200watts to 500watts HPS,and MD lights in my friend's closet, and they are not as blinding as my 22 watt LEDs.
My 100 watt LEDs are even brighter, and they have a weed leaf cut out into its case, with cooling lights and it is even more blinding
 
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