Help Auto stunted growth at 4 weeks old

Kitty Kat grower

Kitty Kat grower

Member
My 2nd grow which I started a mth ago, grown with all equipment ( still need humidifier,) isn't doing great at all . Shes the same strain Northern lights auto as my 1st grow but she has hardly grow in her 1st month. I think I may had over watered her causing stunted growth, so I let her dry out and watered more carefully afterwards but no improvement. I thought maybe she wasn't getting enough warmth at 21c so bought a oscillating fan heater a week ago which has helped in starting her grow a new set of leaves but I've now noticed tips of previous leaves are turning brown. So my thoughts are maybe a nutrient deficiency? I've been using a organic seaweed feed at half required measures twice a week for 2 weeks now and in between feeds watering with small amount of molasses. Which is what I did on my 1st grow..
Or maybe the heater was too hot at 1st and crisped the leaves so have managed to regulate the heat to 25c and also added another cool fan to blow over plant. I've added a pic of her, and would love some advice from you successful growers out there. 20210207_131304.jpg20210207_131248.jpg
 
Arthur Digby Sellers

Arthur Digby Sellers

Member
What lights are you using? LED, HPS, MH? How close, etc.?

If your LED’s or lights aren’t dimmable, I would try starting the seedlings under T5 fluorescent lights. I had a few stall on me exactly like this. Started using a dimmable light in Veg and seemed to knock that issue out..

Seedlings and clones don’t need nearly as much light..
 

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Kitty Kat grower

Kitty Kat grower

Member
Hi thanks for reply Arthur,
I'm using LED, none dimmable, 6 inches from plant... so more expense then lol.
I really do not know anything about T5 fluorescent lights, will it fit in my 2x2x 4 tent? How much are they and are they easy to fit?
 
Arthur Digby Sellers

Arthur Digby Sellers

Member
That would be my guess. T5’s are actually really cheap, so news isn’t too bad. So, is the 2x2 in meters or feet?

I have a 2’x4’ tent for Veg. My LED’s in there are dimmable but if I put T5’s in, I would probably do at least 4-6 lights (they’re like $20 each). Could probably get a 4 light T5 for around $100.
 
Arthur Digby Sellers

Arthur Digby Sellers

Member
Understood.. I would take the light up as high as possible to lessen the strength for sure. Possibly put something above the plants that would offer them some shade as well?
 
quirk

quirk

Well-Known Member
At 4 wks. old you're past the seedling stage and don't require fluorescent. Your plant has light/heat stress and needs fertilizer,
not seaweed. At that age I use an actual 150W white led at 24." You didn't note the wattage of your led, but if it's over 20w, 6" is way too close.
 
Kitty Kat grower

Kitty Kat grower

Member
quirk said:
At 4 wks. old you're past the seedling stage and don't require fluorescent. Your plant has light/heat stress and needs fertilizer,
not seaweed. At that age I use an actual 150W white led at 24." You didn't note the wattage of your led, but if it's over 20w, 6" is way too close.
Click to expand...
Hi, thanks for reply and advice.
I have a 35W full spectrum LED. So should I lift it up to 24" or slightly lower as only 35W?
The seaweed xtra fertiliser by Envil is what I'm using. I'll add a pic of it. I have only been giving equivalent feed of a 3wk old plant because she had stunted growth. At half measures as shes a auto. But if you think I'm under feeding her I'll try giving her more.
 
Kitty Kat grower

Kitty Kat grower

Member
Kitty Kat grower said:
Hi, thanks for reply and advice.
I have a 35W full spectrum LED. So should I lift it up to 24" or slightly lower as only 35W?
The seaweed xtra fertiliser by Envil is what I'm using. I'll add a pic of it. I have only been giving equivalent feed of a 3wk old plant because she had stunted growth. At half measures as shes a auto. But if you think I'm under feeding her I'll try giving her more.
Click to expand...
quirk said:
At 4 wks. old you're past the seedling stage and don't require fluorescent. Your plant has light/heat stress and needs fertilizer,
not seaweed. At that age I use an actual 150W white led at 24." You didn't note the wattage of your led, but if it's over 20w, 6" is way too close.
Click to expand...
20210207_195752.jpg
 

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Arthur Digby Sellers

Arthur Digby Sellers

Member
Kitty Kat grower said:
Thanks Arthur, I've lifted my light to 20" above plant now and put a houseplant in with her to give her a little shade as you advice..
Click to expand...
I ran an auto grow with 5 plants and had no issues. My next run, I decided on only 2 photos and ran right into this problem over and over. In fact, I scrapped 4 plants from 2 unsuccessful tries. From there, I put into the small tent and turned the 100W LED all the way down (maybe 35-50w). The plants took off.

I only moved them recently (1 week ago) to the big tent/light. It is a 200W LED. I have a few other 100W lights I can put in there as the girls grow or ask for more.

The auto in there flowered 6 weeks early. Don’t have it in me to kill her so going to allow her to try and finish and hope for something worth a crap to smoke. Lol
9A1B1A36-C399-421A-B056-42A59C3747A3.jpeg
 
Kitty Kat grower

Kitty Kat grower

Member
Arthur Digby Sellers said:
What the one in the front looked like before the light switch..
View attachment 4819307
Click to expand...
Wow what a difference
Arthur Digby Sellers said:
I ran an auto grow with 5 plants and had no issues. My next run, I decided on only 2 photos and ran right into this problem over and over. In fact, I scrapped 4 plants from 2 unsuccessful tries. From there, I put into the small tent and turned the 100W LED all the way down (maybe 35-50w). The plants took off.

I only moved them recently (1 week ago) to the big tent/light. It is a 200W LED. I have a few other 100W lights I can put in there as the girls grow or ask for more.

The auto in there flowered 6 weeks early. Don’t have it in me to kill her so going to allow her to try and finish and hope for something worth a crap to smoke. Lol
View attachment 4819298
Click to expand...
Wow what a difference with the light switch..
Why do you think your auto flowered 6 weeks early?
 
Arthur Digby Sellers

Arthur Digby Sellers

Member
No idea why. It was rocking and rolling. And then the flower hit. I keep my temps inside the tent presently around 40-50% RH and around 70-72 degrees so it shouldn’t be stress. But, then again, I guess it still could’ve been light stress again as it was in there by itself when I put the 2 photos in the small tent. I just thought autos loved light. ‍♂
 
Kitty Kat grower

Kitty Kat grower

Member
Yes autos do love the light..
I researched a lot about autoflowers before deciding to grow. I decided to go for 18/6 light schedule which seemed to be common amongst auto growers. But I know some growers believe autos do not need a rest period from light and keep lights on all the time. And only yesterday I decided to see if by keeping my LED on 24 hours per day would help my lady. So time will tell...
I've been given some good advice from experienced growers on here regarding my little ladies health and how to make her well again so fingers crossed she will now thrive.
So going back to your autos early flowering that still puzzles me
 
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