Seedlings: leaves twisting

[Pablito]

Specs:
400 HPS
Soil (Plagron Bat-Mix)
Temp: day range: 26-28 C (79-82F) night: 23-25C (73-77F)
Ferts: none
Strains: GH Arjan's Haze, Durban Poison x Skunk, Nothern Lights x Shiva
Watering: when the pot gets 'light', using tap water which I recently ph-downed to reach pH 5.6 (I'll retest this as I maybe went too low)

Hi all,

I have 1 week old seedlings which looked ok so far but I'm starting to see 2 things which scare me:

- the leaves twist (see photo), I read around the forum and I saw many explanations such as bad pH. However the leaves are still green so I don't think there is a nutrient lockout but that's maybe phase 2?




- young shots are just way too small and I think their growth is stunted. Maybe it's time for transplanting or can this be due to a deficiency? (or related to the twisting leaves?). I use rich soil (with bat guano, good pH etc) which should provide enough nutes for at least the first 2 weeks so I don't think it is a problem of lacking ferts...

- some leaves are slighlty starting to have their borders curl up (see plant on the left)




thx a bunch!

P.

 

[Blackvelvet]

Its probably zinc deficiency. Don't freak. It is common in container plants. When you begin ferting, (hopefully weakly soon) make sure to include all the micros like zinc. The micros are iron, manganese, zinc, copper, boron, molybdenum, and chlorine.

 

[Pablito]

thx for the input. I went to Stich's trouble guide and the symptoms he describes for Zinc deficiency are indeed similar to mine (I do have problems with young shoots) but I don't understand how come this deficiency occured so early and he doesn't take much about twisted leaves.
Hopefully you're right and it's just a matter of time before it gets fixed.
laters,

 

[mig]

i actually got alil twisting goin on in my sprouts too...I also have them on a fert regime which might be too strong and i think that is what is causing the twisting. I am unsure. In this book I am currently reading "Mineral Nutrition of Plants: Principles and Perspectives" 2nd ed. by Epstien and Bloom, it describes that twisting could be caused by a zinc def. as well. So im on the fence. A have started them on a slight micro reg. so we'll see. This book is insanely helpful. It basically could take the place of this forum. I highly recommend everyone read this book. It covers everything...i mean like everything, its awesome.

 

[jaykush]

its probably just the plant. some seedlings do that, and most of the time the first leaves out aren't the prettiest or even resemble the later fan leaves. just let them grow they look fine for one week.

 

[MTF-Sandman]

Having a micro def at that age is almost impossible as the cotyledons provide enough to sustain the plant for some time. Looks like a slight N tox or PH problems to me.

What's the PH going in and coming out?
What's the EC/PPM of the nute solution going in and coming out?

That Plagron Bat Mix comes with an EC of 1.4-1.6, so that could easily be too strong for small seedlings like yours if it's not cut with something milder.

 

[Pablito]

thx peeps.

- mig: we'll see but it would be the first I see something like that. i moved them to bigger pots so I'll see what happens now. keep us posted on how yours are going! I don't think nutrients should be added before at least 2 weeks and I'm planning on waiting even more bcz my soil is kind of prefertilized already.
- jaykush: I hope you're right, it's true I'm seeing strange stuff on these seedlings but the new leaves look ok. I didn't check on GH's reputation before getting them and damn now I read a few posts where ppl say they're shit (like the real skunk thread) I'm starting to wonder if I wasted my cash (And I will think that if it turns out my cheapass Nirvana seeds rock it more than Arjan's haze).
- mtf:thought so too I never had seedlings suffer from deficiency in this soil (Ive been using it for years). I checked the pH going in and it's nice: 5.6-6. I can't measure the pH out because I don't have a proper pH meter and the water is not clear enough to use my test (I've got the one where you add drops and see the colour it takes).
For EC it's the same thing I don't have anything to measure EC and I'm not planning on getting one soon: it's way too expensive for me.
I'll try and get them paper tets for pH so I can measure the ph out

thx a lot to all of you! I'll tell you how it turned out

 

[m-eh00]

I had the same problem with my GOD BUD seedlings. I dont know how close your hid is to the seedlings or the strength of you nutes. What is did was raise my light about 2.5 to 3 feet above and ran a very very mild nute strengh. The first set will stay twisted but the following set should com out fine. I hope this helps. Its what I did and it cured the problem.

 

[Pablito]

Well I guess Jaykush was right, after the second set of leaves the plant just started growing fine and now it's fat & rocking. m-eh00 I used no nutes at that point but I did take care about having the light at a decent distance, thx anyway!

 

[Guest]

Having a micro def at that age is almost impossible as the cotyledons provide enough to sustain the plant for some time. Looks like a slight N tox or PH problems to me.

What's the PH going in and coming out?
What's the EC/PPM of the nute solution going in and coming out?

That Plagron Bat Mix comes with an EC of 1.4-1.6, so that could easily be too strong for small seedlings like yours if it's not cut with something milder.

HE IS CORRECT.