Humidity of high.

Hi chaps.
I’ve not had to ask a question for a while because everything was going well with my Big Bang Auto in its small tent, but I’ve hit an issue in week six just as flowering is underway.The weather here has turned wet and hot and boy has the humidity gone up. I have a de hum in the tent and an RVK extract on full chat as well as a couple of other small fans blowing air about the place. The humidity was fine last week but now I’m struggling to get it below 60%. Is this such a problem if I have the flaps open and plenty of circulation?

They will be fine as long as you have plenty of circulation in there. I fight high heat and high humidity in my tent every summer, because I don't run AC in my house, and I have never had to deal with WPM or mold in my tent. I'm sure it can slow down growth some, too, but I've never had any issues that ruined my harvests.

Forgot to add if it matters. The pot is 12ltrs and fabric and I’ve gone all organic with this one too. Thanks in advance for any help. Cheers.

Hello,
What I’d do,
Buy a bigger dehumidifier. Run the AC cooler.
Important!
Clean up all that growth under the canopy. Put a small oscillating fan below the canopy. This alone should get you down to 55% from 60% now.

I was worried about trimming having read mixed reports with autos but I’ll have a snip. As for a bigger dehum I’m not sure the wire would appreciate another £300 piece of equipment in the spare room but I’ll pass it by her anyway.

Baron Von Thunderclapp said:

Forgot to add if it matters. The pot is 12ltrs and fabric and I’ve gone all organic with this one too. Thanks in advance for any help. Cheers.

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I'm running 4 plants in 10 gallon fabric pots right now and haven't been having any issues from the high humidity. The humidity in my tent hits over 80% some nights and has been in the high 60% to low 70% range during the day.

Thanks. I’ll take all this on board. Also anyone notice the bright yellow tips? Didn’t know if this was nite burn or just strain characteristics. Always difficult to know whether to feed due to lack of something or not feed due to burn.

Baron Von Thunderclapp said:

Thanks. I’ll take all this on board. Also anyone notice the bright yellow tips? Didn’t know if this was nite burn or just strain characteristics. Always difficult to know whether to feed due to lack of something or not feed due to burn.

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The yellowing on newest growth is probably just the plant not keeping up with sulphur or iron transportation , probably sulphur , but its common when they explode with new growth in early flowering. It should sort its self out and green up.

You do have a bit of tip burn but nothing to worry about. I wouldn't push nutrients any higher though.

A little fan point up under canopy would be good just to ensure there are no dead zones in airflow.

TreeFarmerCharlie said:

I'm running 4 plants in 10 gallon fabric pots right now and haven't been having any issues from the high humidity. The humidity in my tent hits over 80% some nights and has been in the high 60% to low 70% range during the day.

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I'm in a similar situation. My flower tents go up to 80% during some lights-off periods (with lamps on, it gets down to 45%), despite running a dehumidifier in the surrounding basement room. My basement is so large, and I live right on the side of a lake at the bottom of a mountain range so the runoff water in the spring/summer runs right under the basement floor, it's hard keeping humidity down.

I just ensure that I lollipop and keep the underside of the canopy rather open, and have two 8" fans at floor level oscillating back and forth in an upward, 45 degree angle into the underside of the canopy from the front and back of the tent. I haven't run into any powdery mildew or mold with this very good airflow configuration.

Here's a snapshot as of right now:

Turn the fan off periodically using a WiFi plug, dont need fan all the time, like 50% of time and it spikes humidity esp with fabric pots

coreywebster said:

The yellowing on newest growth is probably just the plant not keeping up with sulphur or iron transportation , probably sulphur , but its common when they explode with new growth in early flowering. It should sort its self out and green up.

You do have a bit of tip burn but nothing to worry about. I wouldn't push nutrients any higher though.

A little fan point up under canopy would be good just to ensure there are no dead zones in airflow.

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Thanks for the info. Actually there is a little fan at the bottom doing exactly that but it’s not visible in the shot.