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Humidity or not humidity issue?

  • Thread starter Thread starter WickedMichelle
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Humidity or not humidity issue?

WickedMichelle 100 Replies 15,263 Views
Page 3 of 6 · Replies 41–60 of 101
#41
Ackiees said:
Thought about a humidifier or maybe using a larger space?
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Got a humidifier day before yesterday... 3x3x6 is as big as I can go in my apartment. I wish I could go bigger, I want more than 2 plants at a time. LOL.
 
#42
HerbalEdu said:
don't forget you can't even follow vpd outdoor.
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If the temperature and humidity are known, VPD can be calculated--and followed. What can't be done is control the weather. Control is the difference between growing outdoors and indoors. Outdoor growers can't control the weather. Indoor growers provide the weather. What's happening outdoors can certainly be measured, though.

HerbalEdu said:
VPD is something fairly new in the cannabis history, people have grown and enjoyed cannabis without having a clue about vpd for millennial.
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People also haven't always known about temperature and humidity, other than what they could feel, and VPD is calculated using temperature and humidity. They're different measurements of the same environmental phenomena. Framing an argument in terms of millennia mustn't overlook the fact that measuring temperature and humidity is also relatively new. Farmers have always had "a clue" about growing conditions, however. We all know whether it's raining or dry, hot or cold.

HerbalEdu said:
cannabis can grow healthy and vigorous without you following precisely vpd
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Of course it can. Then again, things can go wrong, too. Knowing why a grow went well or poorly can be helpful.

HerbalEdu said:
also controlling precisely vpd in a small tent could require a lot of effort and a lot more investement for very little gain than just dealing with the weather and the season indoor. it may depend in what room the tent is located in inside your house also.
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If humidity and temperature are measured and controlled, VPD is also measured and controlled. It just might not be calculated.

The initial investment and complexity of small tents are roughly similar to larger tents relative to scale. Cost per unit of yield probably would vary by tent size, though, due to capital cost differences.

Small tents can be challenging because they're small, but it isn't environmental control that challenges me. My main problem with my small tents is finding space for the equipment, in particular the heater and the humidifier. Placement of circulation fans can also be a problem.

What happens inside a tent certainly can be affected by other things, including what Mother Nature is doing outside. That effect can soon convince an inside grower of the value of an environment controller. It did me. Few of us can constantly adjust our tent environment when something changes, but an environment controller can do that rapidly. So, the key to precisely controlling VPD, humidity or temperature when growing in a controlled environment is to have a controller do the work. When growing in artificial conditions, we replace nature. We provide the sun, the wind, the rain, the day and the night. So, my best advice is not to try to be the controller. Sure, there's an additional cost, but I wouldn't want to run a tent without one. I just don't have the time or energy to do what a controller can do.

@HerbalEdu - I respect you as a grower and value your usually excellent advice. I just can't agree with or even understand your opinions about VPD. It's a useful tool and is easy to use (once it's understood). I grow in small tents (2x2, 2x3 & 2x4) and it's the first thing I look at when I check my controllers.
 
#43
WickedMichelle said:
Got a humidifier day before yesterday... 3x3x6 is as big as I can go in my apartment. I wish I could go bigger, I want more than 2 plants at a time. LOL.
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You could probably do 3 or 4, but it would be tight, especially if the plants are large.
 
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#44
LoveGrowingIt said:
@HerbalEdu - I respect you as a grower and value your usually excellent advice. I just can't agree with or even understand your opinions about VPD. It's a useful tool and is easy to use (once it's understood). I grow in small tents (2x2, 2x3 & 2x4) and it's the first thing I look at when I check my controllers.
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i m just saying you can't control vpd outdoor and believe me rh and temp swing a lot during a whole grow vpd often being out of range despite that the plant and bud will grow well enough.

speaking of my set up i can't control rh and temperature precisely in my small appartement and i have been growing under hps with temp usually between 34°-38°C and now with led with temp between 25° 32° with heat spike for both in summer, both with led or the hps i have had my rh swing from 20% to 80% at different stage of growth and never noticed a difference in growth depending the RH early on or in veg. i rarely got too low rh in flowering my tent being crowded.

so really with proper watering pratice a young plant will grow healthy and vigorous whatever the rh ... and vpd
 
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#45
LoveGrowingIt said:
Do you have an environment controller?
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I do not know. I have an app that I have to use to get any reading on the tent. Their WiFi option LOL.

It gives wind speed, Temp, Humidity, Air Volume and Wind Pressure. Readings are total crap atm. temp 84 degrees F, humidity 62.7% If I shut the fan off, I can get the humidity to 90% or more. But the temp will go up.

I am getting my readings near the plants to be most accurate. So the sensor is under the lights which will make hotter readings, but plants are there so... might be relevant.

I have an oscillating fan in the corner to help cool things off but not really helping.

I did find out that the humidifier can go 48 hours until it needs more water. LOL
 
#46
I really enjoy your posts. You are about a month ahead of my first go round. Your questions are along the lines of shit ive been reading and preparing for and now you are helping my fine tuning. Im looking at humidifiers for my set up now. Will be getting one for the tent and one for the lung room now.

Keep the good info coming for us nubies please!
 
#47
Do you have an Air Conditioner?
When you turn up the brightness on your light, it's going to increase the temperature of the tent. If you're seeing 84 now, later in veg and definitely in flower when the light goes higher, you will be 90+ degrees.
Air Conditioner will lower temps but also lower humidity which will be good later on, you can use your humidifier with the AC if you do need to raise it though.
 
#48
AZreefer said:
I really enjoy your posts. You are about a month ahead of my first go round.
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Thank you 😁

Newty said:
Do you have an Air Conditioner?
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Room AC, I have one in each room. Not warm enough here to run them though. ATM, I have the vent hoses running out a window, I may have to bring the intake hose in.

My fan is very low atm, 30% or less. Anything more will suck out all the humidity. Once I require a dryer climate I can kick that fan up to full power if I need to.

I have been thinking of this. Humidity needed atm is not something I was prepared for. Even on our rainy days here I was not getting much humidity in the tent. The humidifier is helping if I can keep it in there and keep the tent cool. The vapors are cool you would think that would help.

I have been moving things around trying to find the right spot to get things more stable.
 
#49
I’ve found that if I keep my fan on 24 7 and my temp at 70-75 and my rh at 70-75% my plants thrive I feed recommended strength nutes every wet and dry cycle it’s so important I keep my ph of my nutes at 6.2 ec around 780 I hope this helps you out. Peace yall
 
#50
Rooke said:
I’ve found that if I keep my fan on 24 7 and my temp at 70-75 and my rh at 70-75% my plants thrive I feed recommended strength nutes every wet and dry cycle it’s so important I keep my ph of my nutes at 6.2 ec around 780 I hope this helps you out. Peace yall
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do you change ec range through the pant growing cycle?
 
#52
Rooke said:
When I change over to flowering I use less N and more P and K the my ec goes up to almost 900
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and you use 100% soil? I am in 60% coco 40% worm castings and at day 20 I feed 1500ec during flower I plan on feeding 2500ec
 
#54
Rooke said:
I’ve found that if I keep my fan on 24 7 and my temp at 70-75 and my rh at 70-75% my plants thrive I feed recommended strength nutes every wet and dry cycle it’s so important I keep my ph of my nutes at 6.2 ec around 780 I hope this helps you out. Peace yall
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I was told to wait on nutrients until I transplant. That the soil had enough for these small plants.
 
#58
Rooke said:
Yup I’m growing in pro mix HP +
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Feeding Mega Crop 2 part nutes and it rocks but back to Michelle I wish you had 1 T 5 light is all you would need to start your plants with no heat issues or burn issues I tried t8,s this year against the t5’s . The t5,s in the front half and the T8’s on the back half. You can see the difference I prefer the t5’s not so stretchy as there are 16 strains in the picture
 

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#59
What is your humidity level without the humidifier on? It sounds like you have it stuck to continuously run. You press the drop button on the humidifier to set your desired humidity level. You also don’t need to worry about turning the display off until you are in flower. I couldn’t figure out the thing using their controller. It wanted to operate upon temperature not humidity. You purchased the ac affinity humidifier correct?
 
#60
Wow Rooke, that is a nice set up!! 👍

I will look into getting one for the next grow. I am at my limit on what I can spend atm.
 
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