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ShinWeed
ShinWeedstarted grow question 1y ago
Hello, my humidity is currently at 57-64% and I'm on day 3 of the flowering phase. I've read that you should get down to 40-50% in the later flowering phase, how high is the chance of mold if it stays like this, or can it work out this way?
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Week 5
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Ninjabuds
Ninjabudsanswered grow question 1y ago
Hey there great question . I see you with the VIVOSUN grow app… I have their controller… you schould grab their lumaray lights they are legit…. Sorry to the topic You are 100% fine with that humidity that is actually like a golden zone for early flower you will be fine… As long as you keep your humidity below 62 to 65% during early flower now when the plant is done with the strech and it starts to develop buds this is when you need to start to keep humidity below 58%…. Now more alittle further in the future maybe 2 weeks after buds have started to fourm at this time they will be starting to take shape and not be just some random hairs when you see them start to plump up like this that is when you need to try and keep it down below 50 but don’t go below 40 it’s probably better to have the humidity at like 51 52 53 compared to being below 40 so be aware of that don’t super dry out your plants Air exchange is a must. Your exhaust fan needs to be on all the way up or close and then depending on the size of the tent you need fans the turn back and fourth you may need multiple if the tent is large or if your plants are tall you might need one above and one below If vpd/kpa get outta wak you can get a box fan and put it on the outside of the tent blow directly into one of the air holes. Sometimes humidity likes to build up and just the exhaust fan isn’t enough to pull all the water out the tent Last thing don’t drive yourself crazy trying to make it perfect. Haveing it in the general zone plus or minus 5 to 8 degrees out ways is completely ok especially at night humidity will rise a lot of the time with no heat to absorb it Good luck
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Organoman
Organomananswered grow question 1y ago
No it can not stay that way until the end, the risk of mould will be too great. Do what yan402 suggested.
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00110001001001111O
00110001001001111Oanswered grow question 1y ago
Temp and RH should be considered together. Download a "VPD" (vapor-pressure deficit) table. Cross reference Temp and RH% for your VPD. If using atmospheric temperature, subtract 3F as it should be leaf surface temperatures. Most tables will give recommendations for seedlings / vege / flower. You'll also see there is some different but most the same recommendations out there, so don't be too much of a nazi about it, lol. Sometimes you just do the best you can given your climate and equipment.. scale of grow becomes a huge piece of puzzle too. https://ceresgs.com/wp-content/uploads/2018/10/VPD-Bioengineering-Chart-1-scaled.jpg https://www.dimluxlighting.com/wp-content/uploads/2019/02/Leaf-Vapor-Pressure-Deficit-VPD-5.jpg?x91483 you might see some different values and it's probably measuring same exact thing but not in kilo-pascals. https://fastbuds.com/static/img/e438d46b96ccebd5ec0de10f3b1e5544.jpg https://slideplayer.com/slide/14401103/90/images/21/Vapor+Pressure+Deficit.jpg No legend on those.. bad form fastbuds! You'll see regardless of the metric used, the same general suggestions are made. Some deviation to it, of course.
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Yan420
Yan420answered grow question 1y ago
Hey Growmie, 57–64% humidity in early flowering (Day 3) is still okay, but over time it will be too much as the buds get denser. By week 5 at the latest, you should drop it to 40–50%, otherwise it’ll get critical due to mold risk. You should definitely buy a dehumidifier now, or else you'll have to improvise later, and that often goes wrong. Also: Keep fans running 24/7 Thin out large leaves if necessary Don’t let night temperatures drop too much (prevents RH spikes) Everything is still good, but if you’re serious about it: a dehumidifier is worth it now, not just when mold appears.
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