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Hello, All. I’ve been growing in my 20’x20’ shop for 6 months while building out my new cultivation facility. I’ve got seedlings and cuttings I would like to bring to the new building for its first crop, but I’ve had problems with PM, spider mites, and fungus gnats in the shop. Can I...

Thanks for the suggestion. I heard back from TrolMaster and they make a control module (DCC-1) that will activate the fans when either temperature or humidity exceed the set point.

Hi, Guys. I need to install intake and exhaust fans in my veg room (8’x13’) to control high temps during lights on and the humidity spike that happens when the lights shut off. I have a TrolMaster Hydro-X controller and know I can control the fans with temp or humidity triggers separately, but...

Thanks for your replies. The closing on the land I’m purchasing for my grow got pushed back to the end of May, so I won’t be able to plant outside until mid-June. Looks like I’ll just veg under 18/6 until close to the solstice.

Hello, All. I’m getting ready to start some seeds for an outdoor grow in Maine, and I have a question about light duration during indoor veg and timing of moving the plants outside. I have searched this forum and others and have seen differing practices, but here are the two I am looking at...

Thanks. Unfortunately, it’s a detached garage and in winter the incoming air could be -40. I’ve spoken with growers up here that have completely sealed rooms and keep them cool with mini splits. Would that not work? I had planned on using recirculating air purifiers to help with the smell, btw.

The information I found gave different information, but regardless, I appreciate your comments.

OSHA and NIOSH consider carbon dioxide levels above 5,000 ppm to be imminently dangerous to life and health, and several studies have shown lower levels to have adverse acute and chronic effects at lower levels.

Thank you for the reply, Aqua Man. I know that above 2,000 ppm CO2 can become harmful to humans, but I wasn’t sure if the levels used in indoor cultivation (800-2,000 ppm) would be harmful to invertebrates or microbiota.

Hello all. First time cannabis grower but experienced in other types of horticulture. I’m setting up an 8’x20’ veg/clone/mother room and a 12’x20’ flower room in a garage for a small medical grow and I will be using living organic soil for substrate. The rooms will be completely sealed as the...