Does VPD matter at night?

  • Thread starter PulsePeet
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PulsePeet

PulsePeet

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Hey everyone,

I've been working on an update to my VPD guide for a while to answer a question I often get:
"Does VPD matter at night?"

To sum it up:
Although VPD at night isn't nearly as important as your day VPD,
it's still an important factor to consider for vigorous plant growth and increased yields


If you're pressed for time or just don't like reading a lot, here's a handy infographic with a bunch of tips:

1652300704925


Learn about ideal nighttime VPD, how much optimal VPD can increase yields, and more on the blog I wrote

Also if you have any questions or feedback on the blog, lmk. I'm sure there are typos in there lol
 
freezeland2

freezeland2

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I believe that target daytime vpd range of .8 - 1.2 to be late vegetative / early flowering stage. I run 1.2 to 1.6 during mid to late flower. For seedlings through early veg I run . .4 - .8

I do maintain those recommended nighttime vpd during the dark period.
 
PulsePeet

PulsePeet

Supporter
50
33
T
I believe that target daytime vpd range of .8 - 1.2 to be late vegetative / early flowering stage. I run 1.2 to 1.6 during mid to late flower. For seedlings through early veg I run . .4 - .8

I do maintain those recommended nighttime vpd during the dark period.
Those are pretty good values to run, 1.2 is more ideal in flower, but you always have the worries of mold as you get later into it so it makes sense to drop your RH which raises VPD
 

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