Diagnosis needed ASAP seedlings in trouble

Hi,

I'm a new member and this is my first post. This is my second grow. My first grow went without any issues but now I'm having some seedlings (about 3 weeks old) in serious trouble. This is what I got

-several strains: NL, cheese, blue berry, JH, GC and White widow all started from seed.
-PH doesn't seem to be an issue they are watered every 3-4 days until I have run off using HG soil A/B with proper levels at around 5.5-6.5 PH. My tap water is PH 8 but the HG lowers it quite a bit and general I add a little amount of PH down then re-test PH again before watering

-so far I have tried moving the fan away directly from the plants since I thought I was experiencing windburn. Then I made sure my temperatures stayed in check around 75-80 Fahrenheit. My RH is as low as 44% but my humidifier brings that up to about 70% at night. I have raised my 315 CMH light in the veg tent up higher since I was also weary of to much light exposure. None of this helped.

- from what I can see is that the bottom leaves start first and start to yellow, then bronze and finally die off from the Bottom up. The top leaves appear to be doing fine. It doesn't seem to be effecting every strain equally. The Cheese, JH and green crack seem to be coping pretty well but Blue berry and NL are taking a real beating.

Does anyone know what could be going on here ?

Thanks!

Bump

Might have over watered this one. Turn the dehimid off at night.. ir get rid
of it in yiur grow running a dehumid isnt neccesary anyways

I don't think overwatering is the issue here. I am pretty regimented when it comes to watering and wait until the soil is completely dried out and the leave start to droop a little. Then I water with 20% run off.

As for the dehumidifier, there is only one in the flower room. The veg tent where I am having these issues with my young ones has a humidifier running day and night. That being said, my humidity is not really climbing much (I'd say between RH 44 -70)

Can this be fungus issue??

Pots too small, soil too hot.

Yeah I was gunna say the same thing I think the soil is too hot. What kind of soil are you using?

I'm using Fox Farm Happy Frog and I have been watering it with diluted House and Garden Soil A/B. Even at Max temps 80F soil could be to hot?

I can see how the pots may be too small. Should I try transplanting right away ?

Van Heineken said:

I'm using Fox Farm Happy Frog and I have been watering it with diluted House and Garden Soil A/B. Even at Max temps 80F soil could be to hot?

I can see how the pots may be too small. Should I try transplanting right away ?

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Just use plain distilled or r/o water no nutes. Fox farm is a hot soil by itself. I was luck enough not to get burn on mine that were started in ffof but as soon as I added about 400 ppm of nutes they showed signs of burn. I would cut the lower extremely damaged leaves. Give plain water and keep under 24hr lights till it recovers

And by hot I don't mean temp I mean it's got too many nutrients for a seedling

If your going to transplant and use the same soil. Flush the soil really well B4. Push some of the ferts out. That or get a soil that IS NOT pre amended. You need to start seedlings in tame soil, then move to the growing soil. NO MORE FEEDING FOR NOW. You should be able to correct them.

Thank you for the help. I'm going to give that a try. I had no idea hot soil meant nutrient burn but thanks for clarifying that for me !

So I'm also in the process of converting from soil to hydro. I've got an 3x6 ebb and flow and I'm planning growing in coco coir in 2 gal smart pots. Since it's probably time to transplant these is it a good idea to try and transplant these into coco directly ? I've done a bunch of reading a realize this can be challenging having to carefully wash of the soil from the root ball. Is this do able?

If so, should feed them any nutrients in the first week of transplanting from soil to hydro or let them get through the shock first ?

Van Heineken said:

So I'm also in the process of converting from soil to hydro. I've got an 3x6 ebb and flow and I'm planning growing in coco coir in 2 gal smart pots. Since it's probably time to transplant these is it a good idea to try and transplant these into coco directly ? I've done a bunch of reading a realize this can be challenging having to carefully wash of the soil from the root ball. Is this do able?

If so, should feed them any nutrients in the first week of transplanting from soil to hydro or let them get through the shock first ?

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If you trans the plants in to hydro now, they probably won't make it. They need to recover B4 you stress them that hard. Especially if you've never washed a plant and moved it.

Ok that makes sense. So here is what I'm thinking. I'm going to trim the few dead leaves off, transplant into a 1 gal pot after rinsing the FFoF soil. Cut out the bites and flush the pants with distilled water for about a week or so and see how they recover. Hopefully they recover and then I might try transplanting them into a coco ebb and flo?

Van Heineken said:

Ok that makes sense. So here is what I'm thinking. I'm going to trim the few dead leaves off, transplant into a 1 gal pot after rinsing the FFoF soil. Cut out the bites and flush the pants with distilled water for about a week or so and see how they recover. Hopefully they recover and then I might try transplanting them into a coco ebb and flo?

Click to expand...

stop

transplant all the plants into 3 gallon planters (do not use ffof ) roots organic anything but 707 will work ......if un able to get those there is something called blackgold sold in most stores it works

your plants need to be in bigger planters
1 rapid start 5mls per gallon
2 grow 10 mls per gal
3 b-52 5 mls to gal
4 calmg+ 10 mls to gall

skip hydro as it is more complex and requires much more gear......get the basics of reading and feeding a plant down