Seedlings help!

Whatsup guys.. I'm a newbie to growing and would appreciate any help or advice I get to grow beautiful ladies to enjoy.

I started with getting sour diesel (fem) seeds and soaked 3 of them in water overnight. The next morning I saw the seeds splitting and placed the seeds in moist paper towel and put in closet and kept closet dark. I made sure I was a constant upper 70's and checked on paper towel not drying out but not soaked. By day 7 I saw nice white sprout on 2 of them and a small one on the 3rd. I planted into moist Rockwell sprout down and placed back in closet. By day 8 I turned on flurocent light 18" over cubes 18 on 6 off, entire closet is wrapped in mylar. I placed cubes in plastic bag to keep humidity high.

After a few days 2 of 3 had a stem and tiny leaves, all seemed well. Tomorrow is day 14 one of the seedling that started sprouting started turning black and died, one didn't even come out the cube and the sole survivor is still nice and green just small?

Not sure we're I did something wrong. I read the growers Bible a few times over and thought I was following good practice for my ladies to sprout and root in the cubes.

Anyone have good suggestions, advice?

hmm thats not enough info. seedling are delicate and need to be handled as little as possible.

I was thinking maybe I over handled them, but the way one seedling jus turned black and died out of no where was unexpected.

To much moisture I suspect is the culprit here. Seeds need moisture but you over did it. Next time try skipping the swimming lesson, they get plenty of water to sprout from a moist medium. And I have not used rockwool because I have heard it can be fickle with seeds considering how much water it can hold. If you put to much water into the medium and the roots can not breath (literally they need oxygen) then they will turn brown and die, a waterlogged rockwool cube= 0 O2. And to give ya an idea here is a pic of 2 swiss cheese I germed in party cup with seed starter soil (my preferred seed starter is root riot cubes but soil works great too) they germed in 3 days, they were on top of a upside down 7 gal container to get them closer to the light and had a ziploc tupperware container to retain humidity, and the kicker is I germed 12/12 light schedule from seed to try that after having read about it.
anyways your not on the wrong path but its a long road bro.
Swiss Cheese 6 days into dirt

In your pic that light is useless at it's distance. Really hard for anyone to diagnose your problem without closer pics. But as ^^^ mentioned it is really easy to give them too much moisture

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natro.hydro said:

To much moisture I suspect is the culprit here. Seeds need moisture but you over did it. Next time try skipping the swimming lesson, they get plenty of water to sprout from a moist medium. And I have not used rockwool because I have heard it can be fickle with seeds considering how much water it can hold. If you put to much water into the medium and the roots can not breath (literally they need oxygen) then they will turn brown and die, a waterlogged rockwool cube= 0 O2. And to give ya an idea here is a pic of 2 swiss cheese I germed in party cup with seed starter soil (my preferred seed starter is root riot cubes but soil works great too) they germed in 3 days, they were on top of a upside down 7 gal container to get them closer to the light and had a ziploc tupperware container to retain humidity, and the kicker is I germed 12/12 light schedule from seed to try that after having read about it.
anyways your not on the wrong path but its a long road bro.
Swiss Cheese 6 days into dirt
View attachment 3015552

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I am aware that over watering cuts off oxygen to the roots. whenever I would water cubes, I'd squeeze the cubes to makes sure they aren't completely saturated. Maybe that wasn't enough, perhaps that added to over handling them. How do you not over saturate? Your seedling looks great after 7 days. I'm thinking if it would have been better to just plant in soil instead of the rock wool.

Much appreciated info dude. Thanks! hopefully my sole survivor grows big and strong. Today is day 14,by 21 I'm looking to plant in pot.

jartlow said:

In your pic that light is useless at it's distance. Really hard for anyone to diagnose your problem without closer pics. But as ^^^ mentioned it is really easy to give them too much moisture

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Click to expand...

After I noticed the blackening of the seedling I moved light a bit higher. I had it at 18" above plants.

BLazer1 said:

I am aware that over watering cuts off oxygen to the roots. whenever I would water cubes, I'd squeeze the cubes to makes sure they aren't completely saturated. Maybe that wasn't enough, perhaps that added to over handling them. How do you not over saturate? Your seedling looks great after 7 days. I'm thinking if it would have been better to just plant in soil instead of the rock wool.

Much appreciated info dude. Thanks! hopefully my sole survivor grows big and strong. Today is day 14,by 21 I'm looking to plant in pot.

Click to expand...

Don't squeeze your rockwool, give it 3 or 4 good shakes and it will be perfect, next time skip all the needless bullshit and plant it directly into the conditioned rw cube, cover, keep warm, and a couple days later you will have a sprout. Soaking, plastic bags, paper towels, etc are not needed, warmth, moisture, and air work wonders and are hard to duck up