Is this nute burn, or did it get too cold? (Photo's included)

Hey All,

About 7 weeks old from germination, here we have 4 x Amnesia Haze. They are kept in small tent under a 400w and are grown in coco/perlite 50/50 mix and fed with Coco Grow. I have them set to a 18/6, but i am about to flip them over to 12/12. I have an extra oil heater in there on a timer, to come on when the light goes out (it is winter here) on an evening.

The temp in there has been a steady 23/25 during the day, and around 20/21 on an evening. If you look at the photos, you will see the rear right plant is drooping quite badly. About a week ago, the weather turn very cold, and i wasn't prepared for it. I managed to sort the temps it after one night, but after that one night, the rear right plant hasn't recovered. Or at least that's what i think. As you can see the two on the left are thriving.

On an evening I am slowing the speed of my fan down (the one attached to the carbon filter) and have added a tube heater for extra heat. Outside the tent it is around 9 degrees.

Does this look like cold damage? Is it screwed?

They are on a 60% strength nute feed.



Thanks for any help.

AK

What are you talking about? They look fine to me. But point out particular points in your pics if there is something special bothering you. Otherwise just keep on going. If anything it appears some might have a drainage problem or the medium is staying to wet for too long.

It's the plant at the rear, to the right. If you zoom in on image 'e' (hold your mouse over it and look at the last letter).

As hotrod said, they look fine except for they look over watered. Let that soil dry a bit between waterings if you aren't already.

I guess my old eyes just aren't seeing anything I would be concerned about except overwatering some. Even then let it dry more between waterings and they should do great. Very nice looking plants. +rep for that.

I agree, they just look a little wet to me. Nice job.

Thanks for the advice everyone I switched off the flow from the nutrient tank last night, and will leave it off for a few days to let the coco dry a little (my system is a ebb/flow bottom feeder).

Hopefully that will sort it out.

I agree it looks like moisture stress if anything. But thats pretty hard to believe in a 50/50 coco/perlite mix. That should be almost impossible to over water. I would check the drainage in the pots to make sure its not restricted. Is the droopiest plant nearest the heater by chance?