Strange growth early flowering

[Jack_41]

Plants were very quick growers all the way through veg.

I left the girls for 3 days over the Christmas break , auto feed setup just fine.


Came back to a sight I've never had before. Almost looked skeletal.
Buds were small , leaves small and thin.

I'm thinking perhaps they were too cold during lights off.
Only other thing is perhaps its due to me reusing the Coco (say 40% old with 60% new) but I've done it before without issue.

In summary what caused it , is it salvageable? I'm tempted to pull the lot and try again.

Under CMH lights, EC and PH are exactly as before. 1.0 EC , PH 5.8-6.1.
Temps around 21-23c lights on.I don't have a lights off temp sorry.

[Lowrollerbean]

I'm still on my first grow pal but they look hungry, (I could almost certainly be wrong though) is ph and ec pen calibrated? Also could possibly be nitro deficiency...again just my 2p am sure someone will come along and help soon though

[Le chef]

Looks like Mg deficiency and perhaps a little hungry.

[Forest]

to cold get the temps up 26c 27c lights on , shut the air flow down a bit maybe to up it,

and they are mg def (get some mg i like the gold lable one) also up the feed its to low to go in to flower

[Lowrollerbean]

Apologies guys, just realised I said nitro deff I actually did mean cal/ mag...sorry for the misleading info pal

[Jack_41]

Thanks for the advice, I'll give them a few more days with a higher feed dose.

Really don't think they will be worth continuing with however.
Buds are almost "cabbage" like in their appearance.