2 x 4 Tent Looks a Little Full

[Buddo123]

Should be ok. If in doubt super crop as they stretch and tie down.
You can get 2x4 tents that are 7ft tall if needed.

Thanks for the advice on the cropping Coreywebster. Two plants grew 6 inches in the first week after the flip and 2 plants grew 2 inches.... but If they had all grew 4 inches ...lol.

 

[Renfro]

This is a stuffed tent lol. Too stuffed, so stuffed I am having a hard time keeping rh down at lights out.

Do you run your exhaust system when the lights are off?

 

[Buddo123]

Do you run your exhaust system when the lights are off?

Yes I run it 24 hrs, they are a bit smelly lol. I have the speed of the fan set at about 30/35 percent. The fan goes from 0 to 100 % but they neglected to put numbers on it ?/ It vents out the top and I have the two bottom air vents wide open.

The humidity is 51 % in the tent & the temp 25 C/77 F , the house is 45 % & the temp is 20 C/68 F, I have a humidifier on my furnace.

What is your humidity at ?

 

[Renfro]

What is your humidity at ?

Your humidity is fine.

I run swamp coolers to keep my RH% up around 65 - 70% when vegging and stretch phase, once buds start to form I bring it down to 45 - 50%. I rarely have to run the dehumidifiers because the ambient humidity levels here in Colorado are so low. My struggle is keeping it up, thats not as imperative as keeping it down though.

 

[Buddo123]

Do you run your exhaust system when the lights are off?

I guess that question was for jtrizzy... but maybe my answer will help the cause

 

[Buddo123]

This is a stuffed tent lol. Too stuffed, so stuffed I am having a hard time keeping rh down at lights out.

Hey jtrizzy

Renfro had some tips on humidity for you, see page two, check his super grow if you get a chance, sweet !!

 

[jtrizzy]

Do you run your exhaust system when the lights are off?

yea full speed 24/7. still gets up there. better lately but still hits 72 with lights off.

 

[Renfro]

yea full speed 24/7. still gets up there. better lately but still hits 72 with lights off.

Whats the ambient RH%? What is the CFM of the fan?

 

[Renfro]

Either the ambient RH% is pretty high or the fan is not adequate. Also helps if you vent the humidity outside so it doesn't just make the whole room more humid.

 

[jtrizzy]

Whats the ambient RH%? What is the CFM of the fan?

My room RH where the tent is in, is around 50-52. My exhaust is a 4" 203 CFM Vivosun blowing into a 4" carbon filter which I just replaced when starting this grow so its not an old clogged filter.

 

[jtrizzy]

Either the ambient RH% is pretty high or the fan is not adequate. Also helps if you vent the humidity outside so it doesn't just make the whole room more humid.

It vents to the room the tent is sitting in but that room is AC controlled. Humidity in the room the tent is sitting never hits above 52.

 

[Renfro]

Well your ventilation system should be able to keep the tent within 5% RH of the room it's in. You wanna exchange the volume of the tent at least 2 times a minute, better 2.5 or 3. That fan should be enough CFM but probably not enough real world CFM because of the filter and duct restrictions or some issue with intake being inadequate. If restrictions can't be eliminated you may need to change up to a 6" setup to have a much better chance of keeping the humidity under control to prevent bud rot and powdery mildew. You may try pulling air without the filter to see if the humidity drops or disconnect any long external duct runs. Something is causing a massive reduction in the CFM.

 

[Renfro]

Also, is the RH% reading you are getting even accurate? Hate to waste a bunch of time chasing a false number lol.

 

[Gemtree]

I rocked a 600w cool tube in a 2x3 for years and started about that height so you should be good

 

[jtrizzy]

Also, is the RH% reading you are getting even accurate? Hate to waste a bunch of time chasing a false number lol.

It’s a battery humidistat posted up in the tent away from the light higher up. Seems accurate, I don’t have any other humidistat to compare.

 

[jtrizzy]

Well your ventilation system should be able to keep the tent within 5% RH of the room it's in. You wanna exchange the volume of the tent at least 2 times a minute, better 2.5 or 3. That fan should be enough CFM but probably not enough real world CFM because of the filter and duct restrictions or some issue with intake being inadequate. If restrictions can't be eliminated you may need to change up to a 6" setup to have a much better chance of keeping the humidity under control to prevent bud rot and powdery mildew. You may try pulling air without the filter to see if the humidity drops or disconnect any long external duct runs. Something is causing a massive reduction in the CFM.

I am going to pull off the filter when the lights go out and see what happens with the RH. If it drops the RH than my filter is clogged again which blows literally.

 

[Buddo123]

Nature taking care....One of my plants went Hermie so I now have a little more room for the other girls.

 

[Renfro]

Nature taking care....One of my plant went Hermie so I now have a little more room for the other girls.

View attachment 4310352

That looks like a full on male not a hermie.

 

[Buddo123]

That looks like a full on male not a hermie.

It had the nice white Pistils as well, my bad I didn't show them in the photo.

 

[Buddo123]

21 days since the start of 12/12. The plants are 25 to 27 inches from the top of the pots. I did some super cropping in the past week to try and keep the canopy even & It look like the stretch is slowing down. Starting to bud up nice.