Slight curling on top leaves

[athos]

This little guy here is 28 days old and I found it with a slight curling on it's top leaves. What do you think guys? Nute burn? N toxicity? something else? The plant it's outside, the temps haven't been the best, could it be that?

 

[Waira]

...have you fed them? I don't see the usual signs of nute burn, or other trouble,.. did they dry out pretty bad? This looks more like a physical/env. things,... temps, and RH have been--?

 

[athos]

I fed them with an EC of 0,7, just like 6 other plants, but days ago and this is the only one showing this problem. Humidity has been fluctuating between 50% and 70% and temperature has been a bit high this last couple of days around 33°C (91°F), although I had saturated the medium like 2 days before. I watered again yesterday thinking that it could be a heat related problem and today the looked like this.

 

[Waira]

...hmm, well with that info, the T and RH aren't that bad, and not the direct cause... the newer growth being affected, it's something with that last feed... what soil is it in, and have you checked pH in-pot? What nute brand, and dosage?

 

[athos]

The soil is a mix of 50% coco 40% worm castings and 10% perlite. The last feed had an EC of 0,7 total.
I did a thorough flushing of the media and now it looks much better; I'll upload a picture of it in a couple of days.

 

[Waira]

...that seems a bit heavy on the worm castings,...takes away on the breathability of the coco, perlita aside,... but that's not behind this,.. is the new grwoth still deforming? Maybe it hit a hot spot in there,... time will tell!

 

[athos]

This is how it looks now.

 

[Waira]

better!