So I finally got the humidity under control in my flower tent. Now I can actually get everything in Range for vpd. It seems like to get a 1.2/1.3 I have to keep the room cooler. 70 degrees at 55 rh gets a 1.3 vpd. Is this a good setting for early flower? What numbers are everyone running? Thanks y’all , hope everyone is enjoying their weekend so far. I know I am!
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@BigCat420 @Outlaw @HappyHydroGrower @Cap_Ron what numbers do you all run?
I’ve never really paid attention to VPD, though I probably should. I keep it simple and shoot for 60% in veg and 40% in flower, and don’t get too bent out of shape if it varies some. RH is particularly important during flower when you need to keep RH low to avoid mold.
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Being old and forgetful I needed something easy to remember. In general, 0.4-0.8 seedling, 0.8-1.2 in veg, and 1.2-1.6 in flower.
I use those as targets, but find them hard to maintain having three tents spread around the house.
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I like this interactive VPD chart. You can adjust it depending on what stage your plants are in, and your exact ambient air and leaf temperature.
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They are all about the same…that is the one I use however. The Excel sheet you can download from Pulse, so you can edit it custom to your situ.
I have my tent stable at 75 temp , 70 when the lights are off and 50rh. Are these good numbers ? Or do you suggest I change them?
What are your thoughts ?
Hell yeah @Cap_Ron . That site is awesome. How do you get lead temps though ?
*leaf not lead
What’s everyone think about my settings on my flower tent right now . 50 rh ., 75 temps , 70 during lights off
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That vpd chart says I would get a 1.49 but I don’t know if that’s accurate because I don’t know how to get leaf temps.
Whoever is interested this is an awesome vpd chart and it gave me the same numbers.
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Little easier to read in my opinion than all the other ones. At least I was able to find tbe numbers quickly and not have to follow to many lines across.
I keep my flower tent around 68 night temps and 75 day temps. Hovers around 73 for the most part and my humidity bounces from 50-65% rh. Humidity doesn’t really concern me if i have proper airflow. My veg tent i keep 70-78 and typically hovers around 78 day temps and 70 night temps. For humidity i turn a small levoit dehumidifier in and let it run nonstop to keep my rh 60-68%. I typically stay in the 60-64% rh range tho. I used to go off VPD charts but quit worrying about it a while back
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You never noticed a notable difference in sticking to the ranges on the charts ?
I just want to grow that gas. You know the stuff you get from the dispensary that looks like a piece of art. I love fantastic weed, jungle boys, connected, etc. they all go off vpd so I figured that might be what it takes to grow top shelf weed. I know genetics has alot to do with it if not most.
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