I can’t believe he tossed them either…those were PERFECTLY healthy seedlings in those pics…lol. You MIGHT be way overthinking things Aiconic. I have a tendency to do the same thing. I had MULTIPLE issues going on this first grow. FIRST, my light inside was inadequate (only 105W total and a lesser brand/quality light for SIX plants, lol). They got “leggy” first (MUCH spacing between nodes). Took them outside and had TOTALLY misunderstood what “real leaves” meant. I figured if they weren’t the cotyledons and were serrated then they were “real leaves” so when those tiny tots got the third set of them developing, i started giving 1/4 ratio of what the Nutes line bottles recommended and STILL ended up stunting them because those leaves have to develop at LEAST into 5point “real leaves” and they were tiny 3pt leaves, lol. At any rate, NOW, my girls are OUT OF CONTROL in growth once i dialed back and flushed out those nutes and only gave it once they were all at least 18" tall again and started alternating nutes this watering, water/cal-mag next watering, back and forth. They are MONSTERS now 
Don’t give up so easily. Spiny Norman said it best, STOP trying to control the plants. Pay attention to them and to the leaf color charts here and you will learn EXACTLY what THEY"RE trying to tell you they need. It really is more simple than most allow it to be. It IS afterall a WEED and would grow with NO ONES help otherwise if left alone outdoors THAT fact alone helped me to CHILL and just back off and watch the plants and give what they need WHEN they need. You will see subtle signs BEFORE any discoloration if you’re paying attention to drooping, tacoing (which is actually usually too close to lights) , etc etc and adjust what is KNOWN to be the issue for that symptom and check results and you’ll find this really isn’t hard at all Happy Growing, welcome to the forums.
Wow. Are you sticking to top feeding by hand? I tried one plant in an autopot with coco. Just took delivery of another four and prepping 40 - 60L of coco to fill them with. And of course Jack’s 321
Yeah for now but can see moving to an auto-watering system like the autopots in the near future.
you might be over watering they dont need much the first few weeks i soak mine when i pop them in and im sure they dont see any more water for a week
Thank you to everyone in this thread. Your comments did not fall upon deaf ears. Here’s what I did to change my situation:
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I stuck with the Coco Coir. After so many fails I wanted to feel sorry for myself. Couldn’t bring myself to do it. Obviously I was not putting the knowledge together correctly. So I chucked every video and article I read. Came back to this thread and started taking notes. One thing I learned almost immediately is that you guys are consistent. There are base traits and methods that are not always described in a way I understood early on. You guys made it simple. I was too inundated with “learning” to see the obvious. I kept everything simple.
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Instead of Mothers Earth Coco Coir I chose 420 Dakine Blended Coco. It has nutrients in it and comes pre-washed twice. Price wise they’re about the same but the 420 Coco seems even higher in quality in comparison. I am growing Maui Wowie autos and the seedlings did not burn at all. I added CalMag to my of water. Other than that I see no reason to give them what is already in the Coco. At least for now.
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I started them under a seedling light. This may be why I saw stunting in my earlier attempts. It worked out great and the growth was rapid. The water is always PH’s to 6 with or without nutes. No stunting. Normal growth.
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Environment is 75% 65RH for now.
I’ve still got a bit of work to do and a lot of learning as well but I feel like I have my feet on the ground now. Thank you again for the help.
They are looking good and happy. I’m glad you didn’t give up - lots of growers here swear by coco. I will probably be trying it out on my next grow when I can get some auto-watering pots (and maybe a remote on my phone to water them lol)
Just stay on top of keeping them fed and pay special attention for when the cotyledons start to turn yellow - they will likely start needing supplementation at that stage, even if your coco has nutrients in it. I can’t speak from experience other than to say a growing plant will devour everything it can when it wants and not when you want it to.
I’m excited to watch this unfold now
Nice choice in medium, loaded with all the beneficial bacteria needed to her build a solid root foundation 
I decided to switch it up a bit. Make it a little easier on myself. I also used Great White too.
Smart move, I switched from coco to soil back to coco. I could not get my own coc building skills down enough so I went an organic coco (Fox Farm coco loco) great with water only for up to week 4ish. That I get a better yield using coco
You’ve received many comments and I’m reading you totally giving up… For what my comment is worth to you…
Summary: nutrients and co2!
I rehydrated my coco in cal-mag for 24hrs before starting.
I experienced the same issues and more:
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Germination:
Plants grew long stems (stretching) due to a long distance to the light.
Solution:
I placed the light closer on the lowest setting. -
Seedling Week 1:
Still growing long stems and slow growth!
Solution:
I set up a light schedule timer 18h on to 6h off.
I used a 1mL syringe to feed water once a day.
Kept at 65% rH / 22°C temp and introduced a blue light on 24hrs.
I fed them on day 5 with nudes (see end of comment). What really helped, wriggling the stem side to side (careful not to break it) and LST (low stress training). -
Seedling Week 2:
Stems stopped stretching👍but still slow growth!
Solution:
On day 9, introduced home made co2 and monitored it (keeping minimum 1200ppm to max 1500ppm). THIS WAS THE SOLUTION.
On day 10 fed nudes again. THIS HELPED ALOT.
I added more 50% coco to 50% perlite to the pots, making a mountain right up to the first leaves. -
It’s day 17. I’ve learnt high quality nudes, co2 and lighting is most important.
I have equipment to help me.
I recommend having AC Infinity Cloud t6 fan, otherwise, a smart hygro/thermo meter (connects via Wifi).
Today, I’ve received a smart plant monitor so I have a feeding/watering schedule. I believe this will make them grow even faster.
My resources:
- Autoflowering Blueberry
- Canna Coco Professional
- 2 gallon smart fabric pots
- 3 part hydro nutrient system called GP3 by GreenPlanet
- 3x3x6 tent
- Delta Culture Full Spectrum light
- Humidifier
- 2x Vivosun fans
- Plant Growers Red+Blue LED grow light (3 heads)
- North Plant Monitor (get the smart Wifi)
- AC Infinity Inline Fan
Thanks. My grow is in veg now. Doing very well. Just lollipop it. It’s like all the things I learned from my mistakes came together on this grow. Everything is clicking. I know how to grow in Coco now. Just took me a bit longer to figure it out than most. 
Awesome to hear you stuck it out and conquered! Let’s get some pics up? So you have any specific changes you made that you think were the difference?
Basically I stopped reading articles and watching videos and started reaching out to this forum. I was over thinking everything. I did not understand the grow cycle beyond what you learn in high school. That does not apply to cannabis. Especially when you’re growing in a medium with no nutes. So I had the learn the hard way.
Here are the changes I made:
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Used air pots for the seedlings. Transferred to 5 gallon air pots. Zero stunting. All three flowers are Maui Wowie Autos.
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420 Dakine pre-washed Blended Coco. Very impressive. Has minimal nutes. I still provided nutes (Fox Farms trio) + (CalMag). No issues with burn. Could be the strain though. Each strain is different in that regard.
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Patience. By not understanding the cannabis grow cycle I did not know how roots work or how the plant shifts its energy to growing leaves. I had to take a couple of steps back and really read and watch to understand that process. I kept expecting it to grow like a flower. When it didn’t I deemed it a fail all due to my inexperience and impatience.
Now that that part of the flowers life has passed I can easily see my mistakes. Now I am benefiting from not repeating them. I can trust my own judgement now the rest of the way. I documented the entire grow so that I can repeat the process and refine it for future grows.
I’ll post pics soon.
Hey there,
I’d highly recommend checking out PaulinatorPaulinator over on IG. One of the things he’s constantly talking about is developing healthy root systems before you transplant, i.e. Germinate, plant in solo cup with coco and water once every 7 days. One the roots are developed move to a 1 gallon and water every 7 days for a week or two until the roots are developed. Prune and move to final 5 gallon or 7 gallon - this is when you start high frequency fertigation. Coco handles this well but if your seedlings have a small root mass it will never soak up anywhere close to the amount of water you’re putting into the pot. I have a bunch of Cindy 99’s which I just topped at 6 nodes in 3 gallon pots of 70/30 coco and I haven’t watered them in a week at least. They show no signs of drought stress.
I will say if this is your problem soil is going to exacerbate the problem, not fix it. There’s no reasons to change mediums until you figure out exactly what’s going on. If you’re overwatering, for example, in coco coir - this will kill the seedlings even quicker in foxfarm.
Aiconic I’m glad you overcame. You should start a journal to document your grow here. We all love following along. It’ll give you the opportunity to share what you’ve learned to us, and obviously what we’ve learned to you.
I’m looking forward to the pictures 
I am just starting to read here. But this here is normal. Remember. These need to grow roots before they can start growing on the top if no one has mentioned this. I will keep reading though. 
Happy anniversary @beardless
My grow died Friday out of nowhere. Looked healthy and thriving Wednesday and dead Thursday morning. Typical Autos. Uber finicky. Perfectly healthy until they decided they weren’t. But that really isn’t my concern. Look at the lack of roots!!! HOOOOWWW??? How is this possible? I don’t understand.
That’s what has me twisting my brain. I used Great White. Barely watered. Perfect conditions and an air pot for the seedlings until I moved them to the 5 gallon air pot. Same result. I barely watered the seedlings and still no root development. PH’d perfect each watering to 6. I have three fans in the room including one 12 inch ground fan. Plenty of air circulation. Same result. My buddies that grow in dirt. Infinite roots. My buddies that grow in Coco. Infinite roots. Me? Nope. I do not know why. Followed the advise on this board to the letter. Same result. I can’t point to the environment. I can’t point to the nutes (used only 1/4 dose once per week). I can’t point to the Great White. No issues with humidity or temp either. Perfect grow setting. Same poor result in terms of the lack of root growth. There is none. My only guess is that even though I am only using a teaspoon during the seedling stages even that is too much watering and kills the ability for the roots to grow.
is this a trick question? lol… not trying to be funny but it LOOKS like you’re holding what WAS a perfectly green/healthy plant as you described was Wednesday’s conditions, that has been yanked out of the soil by something(/one). I’m not seeing the dead, except the rootball now
Agree with @TheVirginian, looks like healthy roots. In coco it’s water or feed daily after the 2 week seedling period. Possibly root damage during the transplant as in typically their longer If you watered in a ring away from the base in the early sprouting stage. That gets them to spreading out seeking water