Leaf curling

[ninerloco2000]

Hi all, does this symptom look familiar? (see pics). 4 week old AK, LOJ and BB all show same odd leaf mutation. Is it simply hot (high N) soil?.

Soil, indoors, temp and RH within optimal range; LEDs (1200 & 270 w)

[Lotusyde]

This happens to mine underneath my LED light when the light is set closer to the plant or when the plants are young. The photosynthesis is reacting to the high blasts of multiple spectrum waves and creating small folds tucks and waves on the fan leaves while the stems are stress free and the leaves have a very consistent healthy color.

Personally I believe it to be a symptom of explosive growth due to the range of spectrums available from an led light. However if you find it to be an issue and if it doesn't balance out once the leaves mature further, while in your veg state (as long as heat is not an issue), add a little bit of distance in between your light and your plants. Leds can still burn regardless of their ambient heat.

However I've found that once the plant matures more the leaves will stop doing this, it will only happen on the new top growth of every sprouting node while in its initial veg state. There after you may find the same thing happening in it flowering state to the small leaves around the forming buds. Same reason, and from my experience a non threatening symptom of an led grow.

I hope this helps somewhat, if you need further elaboration please ask away.

[Tika]

I have had that "strange wave" under T5s in veg area. Don't know - still- why but looking forward to more input on this.
my plants did fine tho

[Lotusyde]

Leaning towards it being a spectrum intensity+veg issue. My friend uses T5s and has the same thing when they are younger plants, interestingly enough the T5 spectrum and led share a lot of the same ranges minus red.

[Tika]

Thanks for that Lotusyde. Really interesting

[PigSquishy]

Interesting, I've never seen this kind of a leaf curl before... interested to see how this turns out.

[ninerloco2000]

Thank you all for the great feedback. @Lotusyde:Being an engineer I love the very technical response. I will monitor and see if the girls grow out of this "phase".

[Lotusyde]

You're welcome, please update us soon. Happy growing

[Sonnyhad]

yeah, let us know, we all learn something everyday, despite being over 60!!

[yamiacaveman]

Boy, I had the same thing on one, no I'm sorry, on both of my plants at about the same size as yours. Just maybe 2 leaves on each plant, thought they were funny looking, got a little worried, but they looked healthy, and then in a day or two they started to look normal again. Hope they straighten out for you too.

[ninerloco2000]

Hi all, been a couple of weeks since the girls went through that odd leaf curling dance. As noted by a few of the comments, they out grew whatever that was and are flourishing.
A little LST, a dash of topping and fimming did the trick. Now time to flip the switch. Happy Flowering to All!

[Flockshot]

Good looking garden.

[Flockshot]

I have got the same thing with my 400w T5. I had attributed it to being the early sign of the calcium deficiency, because first came the curl and then the calcium problem. I can't prove they are related but the next time I see it, I will be checking my PH and upping the cal-mag a bit.