I am struggling with getting a low RH in my environment. Looking at my Pulse data for the past 17 days, my average RH is 65 (66.2/day, 61.5/night), and I’m in flower. The bad thing is when I was scoping out the trichs this morning, I saw a bud that had some mold. I had this happen to a few fat buds last grow, so I greatly increased my air circulation in the tent and started running a big dehumidifier (4000sq. ft./70 pint) in the lung room during lights out since I was getting RH over 70 during lights out. I see the RH in the lung room drops to 45-50, but it’s not dropping that low in the tent. I’m sure this is due to transpiration, and I need to setup a system where my runoff drains to the outside of the tent instead of trays in the tent that sometimes sit there until I vacuum it out the next day.
I’m in a 5x5 tent, with 2 larger floor fans at the back of the tent pointing towards the center front creating a “X” pattern of airflow towards the bottom, and I have 4 of small clip-on fans on each corner of the tent blowing down towards the canopy. The plants are dancing nicely. I also have an AC Infinity 6" that runs constantly to keep fresh air coming in.
What other suggestions do you have to lower the RH in the tent. I know I need to work on getting my runoff out of the tent in a more efficient manner. However, even when I do vacuum out the trays, I still see high RH during lights out. Any suggestions for perhaps a secondary, smaller type of dehumidifier in the tent? However, I’m at the upper limit of temperature, and would not want to increase temperature in the tent, which these dehumidifiers generate a lot of heat. Also, these things use a lot of power…the big one in the lung room uses up to 700 watts. So, it’s also a balancing act of weighing out costs as well…this is primarily a fun, hobbyist grow, so it’s not worth it adding an additional $100/month to the electricity bill.
If this matters, I also use an automated drip system where I water/feed up to 5x during lights on. I really feel the plants love this. I suppose I could try reducing that next grow to see if that makes any difference, but I would rather not.
I live in Florida, so temps and humidity will always be a struggle, so I’m looking at the most efficient way to get the RH down so I can get better quality buds in this tough environment.