Any ideas?

[wightwitch]

More info is needed, type of lighting, how far from plants, soil type, temp and humidity of room, pH and what you've been feeding. Some issues can look similar, so lay it on us so we can help ya figure it out.

250w hps x 2. Raised to two foot away. Now higher. Also an old 600w cool box five feet away.
Soil lite mix and added petite. Seems to be ok. Moist and pretty loose.
Temps running at 27 to 31 degrees.
Humidity sitting around 45%
Not ph ing. My water is hard and comes out of tap at 7.
Nutes. Plain water until 15 days old
Then half strength canna terra Vega and rhizo.
Alternated with plain water.
Cal mag added once so far.
"Chill used for last three waterings"

Growth seems really variable. Out of twelve plants four look sick. Four look great. And four look slower but healthy.
30 litre pots.
Lights on 24 hrs except last few days I've sprayed for mites so switched of four hours to let them dry.
Thanks for reading!


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[wightwitch]

Also the sick plants seemed to have twisted new leaves growing. They were curled upwards looking like heat stress.

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[Arthur]

I'm thinkin heat stress... 1100 w of hps is an awful lot for such tiny ladies... + your temps are elevated AND low humidity. Girls are sweating out more fluid than they're root system can take up. I'd at least shut down the 600 till they're bigger. I used to have a 6X6 area for vegitative grow area under 400w of Mh.
( photo plants) Back off the lighting and maybe switch to a 20/4 timing and mist them lightly after lights out or 30 min before lights on... I'm not an expert, but that's the direction I'd head if this was my tent.

 

[Arthur]

Oh, you need to ph'ing your solutions, 7 is high, and nutes can make that go up or down, this'll cause lockout of some nutes, so there could be a mild deficiency going on as well... I'd go after the lighting now, and pH @ next water/feeding

 

[wightwitch]

I'm thinkin heat stress... 1100 w of hps is an awful lot for such tiny ladies... + your temps are elevaded AND low humidity. Girls are sweating out more fluid than they're root system can take up. I'd at least shut down the 600 till they're bigger. I used to have a 6X6 area for vegitative grow area under 400w of Mh.
( photo plants) Back off the lighting and maybe switch to a 20/4 timing and mist them lightly after lights out or 30 min before lights on... I'm not an expert, but that's the direction I'd head if this was my tent.

Thanks. The 250's are dimmable. Go up to 400w. The cooltubes are ancient and I could see needed new bulbs so I put the little ones on as well. They're coming up to three weeks now. So should I switch off the six and gradually increase light as they allow? Forgot to say. Also a six inch on filter. And a six inch on cool tube. I could use both extractors I spose to pull temp down?
Thanks!! Thank god the weather is lousy again. [emoji3]

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[wightwitch]

Oh, you need to ph'ing your solutions, 7 is high, and nutes can make that go up or down, this'll cause lockout of some nutes, so there could be a mild deficiency going on as well... I'd go after the lighting now, and pH @ next water/feeding

Got it. No ph pen at mo. But will order one next week.

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[Arthur]

Yeah, I'd turn off the 6, and either dim, or probably raise the 250s to 30-34 inches or so till I saw indication of recovery, then gradually bring them back closer. Good air flow is great, but more might not be the best idea, as more airflow will cause more transpiration from the plants, and that's not what you want right now.

 

[wightwitch]

Yeah, I'd turn off the 6, and either dim, or probably raise the 250s to 30-34 inches or so till I saw indication of recovery, then gradually bring them back closer. Good air flow is great, but more might not be the best idea, as more airflow will cause more transpiration from the plants, and that's not what you want right now.

Ok. Thanks. I'll switch it off now and leave the 250's they are. Hopefully temp will drop slightly too.

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[Arthur]

this'll give you an idea of where you wanna be ph wise and see what might be locking out when you get your ph setup.

 

[wightwitch]

View attachment 785636 this'll give you an idea of where you wanna be ph wise and see what might be locking out when you get your ph setup.

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