What is the ideal temperature & humidity for different plant growth stages?

[VIVOSUN]

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[Creeperpark]

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I run everything as dry as I can get it to keep the leaf tissue tough. I start in the upper 20s and try to stay below the 40s range. This keeps mold in check. The trick is to start dry and the plants will acclimate and adapt to that range.

 

[DaEarl73]

Read a vpd chart

 

[troutman]

25C - 28C is ok with a slight drop once the lights go off.

 

[VIVOSUN]

25C - 28C is ok with a slight drop once the lights go off.

You converted the Fahrenheit to celsius yourself, right?

 

[troutman]

I can convert to Kelvin degrees if needed too.