First DWC RH problems/questions

[Imagine]

Hi folks, my first attempt at DWC is going well so far but this big girl is just starting to flower and I'm having trouble getting the RH down and I don't want mold or bud rot problems.
I'm running Phoenix seeds auto ultimate under a MH SP3000 in a 5 x 2.75' closet with a infinity 6" exhaust vented outside. 10 gallon tote for the res, with MC 2 part neuts. She's drinking about 1.5 gallons of water a day.

Presently the lights are 18/6, the temp averages 75 and the RH averages 72% If i run the exhaust high enough to lower the RH, the temp gets to low as well.

Run the fan high and add heat or get a dehumidifier?

 

[Goud S!]

Very nice plant! The dehumidifier is a double edge sword as most of them exhaust warm dehumidified air so you might end up running your fan full anyway. I guess IMHO it comes down to what's cheaper to do...heat the room and run the fan or run the dehumidifier and run the fan!

 

[DCLXVI]

For a first run at DWC, that is a monster! Holy cow.

 

[Imagine]

Thanks! This is the biggest plant I've ever grown indoors and she is a transpiration machine.

 

[Mañ'O'Green]

When you say vented outside do you mean outdoors or just outside of the cabinet? A dehydrator in the lung room will help a lot. You can run up to 82°F with LEDs with out any heat problems You should be able to get the RH down to 50%.

That is a very bushy plant and you can remove some leaves from the bottom and inside for air movement. This can help a bit but you need a dehumidifier.

 

[EP3]

Absolute monster!!
Nice job.
Cheers,
EP3

 

[CannabisMingus]

Nice work! I would try both (fan and dehumidifier) and see what works. I like your res. BTW. I have the same thing.

 

[Imagine]

When you say vented outside do you mean outdoors or just outside of the cabinet? A dehydrator in the lung room will help a lot. You can run up to 82°F with LEDs with out any heat problems You should be able to get the RH down to 50%.

That is a very bushy plant and you can remove some leaves from the bottom and inside for air movement. This can help a bit but you need a dehumidifier.

Hey MoG, I vent outdoors. When you say lung room, are you referring to the room my intake comes from? If so, this is a conditioned space with 45-50% RH already but I can add a dehumidifier to get it lower.

I had thought about removing some leaves but I've done that twice already (believe it or not ) and didn't want it to stress more.

 

[Mañ'O'Green]

Hey MoG, I vent outdoors. When you say lung room, are you referring to the room my intake comes from? If so, this is a conditioned space with 45-50% RH already but I can add a dehumidifier to get it lower.

I had thought about removing some leaves but I've done that twice already (believe it or not ) and didn't want it to stress more.

Yes the room the tent is in. I have to lower my lung room to <40% to get the grow space down to 50% when I am in your "season". My needs change all year.

That is the thing about defoliating, If the plant wants the leaves it will just regrow them. I think this is a waste of energy that the plant can direct to the buds if the leaves are just left alone. In your case though removing a few low and inside leaves could help with the RH.

 

[Imagine]

Thanks MoG! I made some adjustments tonight so I'll wait a couple of days and see how it does.