Humidity Problems

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u1st13itch

Active Member
My grow tent's humidity is quite low and I've tried different methods on raising it. It's usually around 15-20% sometimes 40% if the air outside is humid. I tried the damp towel, cool mist humidifier, and just leaving a bowl of water in there too. I can't seem to reach the proper humidity levels, which is around 40-60% for veg. My grow tent is a 48x24x60. I also have two inline fans one for exhaust and one to bring fresh air inside the tent.
 
Mad_Prophessor

Mad_Prophessor

Well-Known Member
Stop worrying about the RH. Low is fine. High is a problem. Basically, if you have a really low RH, your plants will drink the water from their pots much faster than if there was water in the air that they could drink. I usually have a low RH (about like yours) and I never have problems except for they drink like Marines. You can get a spray bottle and mist them twice a day like clones if it makes you feel better, but it is really nothing to worry about.

On a side note, when they are almost done, if the RH is really low, they will grow big, fat trics to cover itself in an effort to preserve moisture. Low RH in flower is your friend!
 
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u1st13itch

Active Member
Mad_Prophessor said:
Stop worrying about the RH. Low is fine. High is a problem. Basically, if you have a really low RH, your plants will drink the water from their pots much faster than if there was water in the air that they could drink. I usually have a low RH (about like yours) and I never have problems except for they drink like Marines. You can get a spray bottle and mist them twice a day like clones if it makes you feel better, but it is really nothing to worry about.

On a side note, when they are almost done, if the RH is really low, they will grow big, fat trics to cover itself in an effort to preserve moisture. Low RH in flower is your friend!
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Oh! Thank you for the reply haha. How often should I be watering my plants? I'm using Fox Farm Grow Big for Veg as of right now. Should I feed them nutrients every time I water? or switch it to clean water every other watering?
 
Mad_Prophessor

Mad_Prophessor

Well-Known Member
u1st13itch said:
Oh! Thank you for the reply haha. How often should I be watering my plants? I'm using Fox Farm Grow Big for Veg as of right now. Should I feed them nutrients every time I water? or switch it to clean water every other watering?
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Water them when they are dry. I alternate between food and water. Keep in mind, if you give them too much food, you will have salt buildup on the roots. Try to incorporate blackstrap molasses in your water to help dissolve the salts. To be honest tho, it sounds like you have about a weeks worth of reading ahead of you before you move forward on too much else.
 
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u1st13itch

Active Member
Mad_Prophessor said:
Water them when they are dry. I alternate between food and water. Keep in mind, if you give them too much food, you will have salt buildup on the roots. Try to incorporate blackstrap molasses in your water to help dissolve the salts. To be honest tho, it sounds like you have about a weeks worth of reading ahead of you before you move forward on too much else.
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Oh I've been doing tons of research on how to grow cannabis. I just like gathering different types of information from different growers so I can incorporate into my grow. I've watered my plants only when the soil is dry about an inch deep.
 
Mad_Prophessor

Mad_Prophessor

Well-Known Member
u1st13itch said:
Oh I've been doing tons of research on how to grow cannabis. I just like gathering different types of information from different growers so I can incorporate into my grow.
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I have been growing for 20 years and I still spend hours reading up on it daily. I stand by my original statement tho. In particular, focus more on soil mixes and nute lines. If you are comfortable with multiple aspects of growing, than this is where your focus should be.
 
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bigsteve

Well-Known Member
I bought a cheapie humidifier at WalMart for $25. You need the type where you put water into the unit.

Good luck, BigSteve.
 
A

az2000

Well-Known Member
You can get a humidity switch to control a humidifier. It's called a WillHi WH8040. I bought one for controlling a fan in a drying cabinet. But, it can be configured to turn on (or off) a humidifier. It has some features like how much humidity difference must exist between on/off. Or, how much time should elapse before cycling on/off.
 
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u1st13itch

Active Member
Mad_Prophessor said:
I have been growing for 20 years and I still spend hours reading up on it daily. I stand by my original statement tho. In particular, focus more on soil mixes and nute lines. If you are comfortable with multiple aspects of growing, than this is where your focus should be.
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Thank you! I'll definitely read up on different soil mixes and nute lines. I wish college could be this interesting... I find myself doing more studies on how to grow than my actual work haha. Anyways, thank you for your information!
 
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u1st13itch

Active Member
bigsteve said:
I bought a cheapie humidifier at WalMart for $25. You need the type where you put water into the unit.

Good luck, BigSteve.
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I have a cool mist humidifier that fills up to two gallons. I guess my fan is pushing too much fresh air inside my tent to actually raise the humidity levels.
 
Mad_Prophessor

Mad_Prophessor

Well-Known Member
u1st13itch said:
Thank you! I'll definitely read up on different soil mixes and nute lines. I wish college could be this interesting... I find myself doing more studies on how to grow than my actual work haha. Anyways, thank you for your information!
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Great plan! I am very partial towards Blue Planet nutes, but I have been using them for years and just love the lineup. I know what you mean. I am glad I can help.
 
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