Home Forums Cannabis Cultivation VPD – Vapor Pressure Deficit

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    • #2930
      Cannabliss
      Participant
      Points: 4,164

      There is a lot to absorb when it comes to creating optimal conditions for our garden. I have collected a couple of links I thought gave me the best understanding of what VPD is.

       

      https://drygair.com/blog/vpd-vapor-pressure-deficit/

      Vapor Pressure Deficit – The Ultimate Guide

      https://pulsegrow.com/blogs/learn/vpd

    • #6061
      Cannabliss
      Participant
      Points: 4,164

      How does everyone monitor their grow space environment? I use an inkbird Ibs-th1 & th2 wireless Bluetooth hygrometers. I also have the Th3 model, but haven’t implemented it yet. Possibly going to use it for my curing jars.
      I love the monitor though. I can connect & see multiple environments at the same time.
      Currently monitoring the 4×4 in flower & the drying tent. 

    • #6064
      Brad104
      Participant
      Points: 767

      That’s a awesome hygrometer dude.Inkbird does sell quality products.Ive got a inkbird hygrometer but it’s only battery less and not wi fi capable but the meter works great.Ive also used a few other inkbird products.Theyre a solid reputable company for certain!

    • #6107
      Keith
      Participant
      Points: 6,116

      I use the ac controller to monitor.  It’s only Bluetooth so when I’m in the house I have to go near the back door or if I’m sitting on the couch i have to raise my phone in the air and it’ll pick up signal and I can check it. I can’t tell you how many times I’ve done that and then immediately ran out back to adjust something.  Now I have a wifi temp controller from inkbird.  I really want to get a wifi hygrometer.  They’re not expensive, I’ll prob get one soon.

    • #6119
      Nate
      Participant
      Points: 470

      I use a cheap govee thermometer/hygrometer off Amazon. It’s Bluetooth which is nice, and it tracks all of your data on a graph which is cool too. It will also calculate VPD and dew point for you. The only downside is it isn’t wifi, so you have to be within Bluetooth range to check it. I’m thinking of getting a wifi enabled one from the same brand so I can check on my plants from work.

      • #6125
        Keith
        Participant
        Points: 6,116

        For the few extra bucks wifi costs I think it’s worth it.  I need to do the same for the rh.  I wish I would’ve got the inkbird temp and humidity controller but the wifi temp controller was 50% off that day.

      • #6176
        Nate
        Participant
        Points: 470

        Yeah I just wish I had gotten a wifi one in the first place. Oh well, I’ll just have two lol.

    • #6127
      Atom
      Participant
      Points: 691

      I use the ac infinity control module. It does connect to wifi but I have yet to set it up. I’ve only had it for about 6 weeks, I have 2 older model ones as well. My room stays pretty consistent although it would be cool to have a record of it all.

       

      Here’s a shot with light off. It will drop down to about 74 after the veg light turns off. I took out the AC so I have a little less control of lowering temps. It goes up to 80-82 with light on.

    • #6186
      Somatek
      Participant
      Points: 6,637

      I have a couple inkbird data loggers (not sure the model numbers) for temp/humidity and one of their temp/humidity controllers for my older 6″ vent fan (can’t remember which brand off hand), as well as an infinity.  Although I’ll probably try Spider Farms version for my next fan as I’m not horribly impressed with AC infinity in general as I’ve had two controllers die within a couple years.

    • #7232
      Brad104
      Participant
      Points: 767

      I know that it’s definitely cold on this side of the US,so I need to check all of my hygrometers I have 3 total

      • #7248
        Cannabliss
        Participant
        Points: 4,164

        Oh yes! It’s getting very scary for outdoor plants that have yet to finish.  I have a bag seed out there in a small pot, and I’m shocked she’s still holding up fine. The 7gal pot is doing awesome, but that was expected given the breeder. Thug pug Genetics packs aren’t pricey for nothing.

      • #7360
        Brad104
        Participant
        Points: 767

        Hey bro as you know I am going to be growing in my 4x4closet space so do you think if I get the SF 6inch inline fan and the WiFi humidity and temperature model set it up to my numbers that I will then be ok for I’m not going to be air tite you know but I been seeing people use a 2nd fan would that be necessary or can I do very well with the SF unit I described thanks in advance bro

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