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Humidity, temperature, vpd
Robin87started grow question 13 days ago
Hi, so I’m just in flower on my first grow, so with the humidity, heat, VPD, can anyone point me in the right direction for actual numbers I should worry about, so, today, at one point the heat reached 95F, with the humidity still no lower than 55% with a c02 bag, please help 😅
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Hashyanswered grow question 13 days ago
Hi mate, look up a few things VPD for different stages of growth, for me my aims are. Seedling VPD 0.4-0.8 for veg 0.6-1.2 for flower 0.8-1.4. I have a grow just started, it's warm at the moment where I'm from, my tent is easily hitting 26+c RH45-50% that's going to be making my VPD very high, probably around the 1.6 mark. My plants are a few days old and I'm well out the place I want to be at. So I have a humidifier running to raise the RH which also lowers my temps, just by doing this I'm getting 23-25c and 60-70%RH which is balancing my VPD around 0.4-0.8. There are loads of charts around that show you what to aim for.
m0useanswered grow question 13 days ago
c02 bags do jack all best option is to just use a tank of co2. also its useless to use it unless the room is sealed. If you venting out anywhere then its wasted product and money.
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Scrubbyjimbobanswered grow question 13 days ago
At one point? So this is a peak over the course of your lights on and not what you're running at once your lights warm up. Are you venting your exhaust into the same area you get your fresh air intake? If so running your exhaust out of that space would probably make a dramatic difference. Are you exhausting at all since you're using the co2 bag? I would ditch the bag and run an exhaust if that's the case.
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Hashyanswered grow question 13 days ago
Just to add, I'm not saying run a humidifier to lower your temps as your in flower and don't want to increase the RH. There will be someone who has a good solution for lowering the temps a little. As for the co2 bag, it should help a little but not to the extent you need it to.
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