Need your help identifying this nute deficiency in a seedling.

Soviet343

Active Member
Just some background - I had a HORRIBLE experience, three times, with Coco Coir damping my seedlings off so this is my first attempt at soil growing. So forgive my below ignorance, but this is still my ongoing "first grow attempt".

Here is a my seedling, a Nirvana Snow White in some Miracle Grow Seed Starter soil mixed with about 30% Pearlite.

Here is the deficiency:

bean2.jpg

The kicker is I just watered 2 days ago, about 2oz of water, and the leaves are still drooping... so I'm not able to correct it without watering again and risking damping off... See how the leaves are drooping?

bean1.jpg

This was fed day after noticing the discoloration about 1/8 tsp in 1/2 gallon water of the Alaska Fish Fertilizer 5-1-1 but I did not add Cal-Mag as I wanted to see if low-strength nutes fixed it. Obviously did not. :cry:
I am guessing 1 tsp / gallon is standard for this stuff, but that's if I half the nute recommendation on the back for "large indoor plants" since my plants are just seedlings.

2x 2700k CFL and 1x 6500k CFL over each plant, with a Blackstar 240UV in the tent too covering both plants.
Temps - 73f - 76f depending on RH
RH - It can bottom out at around 25% in my grow tent, but with a damp towel hanging in the grow tent it's about 55-60%.
12" fan blowing on them both on low setting.

Now to help dry out the soil and get rid of the over-watering, I took the towel out last night so the plant sat at 77 degrees F, 25% RH overnight but leaves still droop. How long is this going to take to go away so I can water again IF cal-mag is the issue?

I also have a Nirvana Aurora Indica that looks healthy, is not suffering from the same deficiency but has really stalled in it's growth. The first leaves aren't as big and the itty-bitty 2nd leaves coming in haven't grown much in a day or two, if at all.

The Aurora Indica was also fed the same nute solution but doesn't show any deficiency what so ever. I am hoping it's just rooting itself and isn't putting much into leaf growth right now.

Really scratching my head here...

:-|
 

dannyboy602

Well-Known Member
Shouldn't have fed it anything. That was the mistake you made. Don't feed seedlings anything for the first month. It will probably bounce back. It wasn't the MG. don't let anyone convince you that it was.
 

Ou8aCracker2

Well-Known Member
1) the soil looks dry to me.

2) What is the pH of the water and nute solution you're watering/feeding with?

It should be between 6.0 and 6.5
 

vostok

Well-Known Member
Вам не нужно, чтобы кормить его ничего, лучше, чтобы смыть почву ...my blog: https://www.rollitup.org/blogs/blog32237-flush-baby-flush.html
 

Soviet343

Active Member
Shouldn't have fed it anything. That was the mistake you made. Don't feed seedlings anything for the first month. It will probably bounce back. It wasn't the MG. don't let anyone convince you that it was.
The deficiency existed before the feeding. What do you mean that was the mistake I made? The symptom existed before any troubleshooting began, so that is not the issue.

This is, at best, what I can tell but I need a second opinion:

http://www.growweedeasy.com/magnesium-deficiency-cannabis
 

Ou8aCracker2

Well-Known Member
Shouldn't be a Mg deficiency as FFOF comes ammended with dolomite lime which buffers pH anf id a goof source of Ca and Mg.It also comes ammended with crushed oyster shell which is also a good source of Ca and Mg.
 

Soviet343

Active Member
Shouldn't be a Mg deficiency as FFOF comes ammended with dolomite lime which buffers pH anf id a goof source of Ca and Mg.It also comes ammended with crushed oyster shell which is also a good source of Ca and Mg.
What?? I'm not using FFOF... I'm using Miracle Grow Seed Starter.
 

Ou8aCracker2

Well-Known Member
Oops,my bad.

Okay then...I've never liked it because I'm sure MG doils have time released ferts in them.

Stick to high quality potting soils.

And now that I understand what you're growing in it may very well be nute burn or a defficiency.
 

JohnDee

Well-Known Member
Oops,my bad.

Okay then...I've never liked it because I'm sure MG doils have time released ferts in them.

Stick to high quality potting soils.

And now that I understand what you're growing in it may very well be nute burn or a defficiency.
He's using MG seed starting mix.
JD
 

Soviet343

Active Member
Boys... boys boys boys....

Ok, well after careful consideration I flushed the pots with PH'd 6.5 give or take with 1.25ml of CalMag in 1/2 gallon (standard is 3-5mg per gallon) so we'll see if that helps.

I bought a moisture, light and PH probe for like $10 at Home Depot and the thing barely reads any moisture when probing 3/4 of the way down so if this is over-watering then I'm fucked.... Lesson learned.

The leaves did feel a bit "crispy" but droopy so that leads me to believe, and God I hope... they're thirsty.

Coco Coir and damping off was a fucking nightmare.
 
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