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https://www.rollitup.org/t/cold-growing.896067/ There's the thread. I run like this every fall and winter. Partly out of necessity and partly out of preference.

KryptoBud has the ideal solution if you can swing that. Those bulbs are not really ideal for that type of mix.

You're humidity was ok and your lighting good. Your circulation is the problem. Exhausting is good for drawing old air out and fresh air in, but the plants need a solid breeze with lights on. An oscillating fan right on them removes the boundary layer from the underside of the leaves, allowing...

What was your humidity and how was your circulation? Both of those combined with your lighting matter much more than temp.

Temp is fine. They're small, so they won't drink much. If you pump them full of water, it'll be too much for their little root system. You may be able to get away with it, but it's not the best solution. What kind of medium are you using? As long as it's somewhat soil based, they make bulbs...

Mine do just fine with lows of 43-48 with lights out and highs of 55-62 lights on. Growth hasn't slowed at all. Just depends on your other factors. I made a thread about cold growing. I do it every year, indoor and outdoor. Doesn't affect yield either.

I'll probably transplant in another week or 2 to beef it up in veg before flower and then a final transplant before the flip.

I run organic now too. I had the same issues as OP when I first started. That's why I made the switch. What's not adding up is 6.8 is coming out to 5.6. Granted, runoff will be lower as it travels through the medium, it shouldn't be that far of a drop. Maybe a couple tenths. It's either the...

The runoff is at 5.6. Even with the nutes, soil, or whatever you want to throw out there, a 5.6 runoff after consistently watering at 6.8 makes no sense.

A pic would be great as well as I think it's been a longer issue than you're making it out to be.

You need to raise the ph of your watering to stabilize your soil. I asked if you adjust your ph before or after adding nutes and didn't see a reply. 5.6 is low for runoff, especially if your watering with 6.8. Either your mix is fucked or you're not ph'ing right. Can you answer the ph...

As long as you keep the soil from freezing, your humidity in check, and air circulation good... You can drop into the low 40s with your canopy.

I just watched into his light cycle speech. Has absolutely nothing to do with what I'm doing.

Thanks. That's what I keep reading. I'll definitely be narrowing it down to that cut then.

Well it's taking forever to load. It would take me 3 hrs to watch. Has he tried this schedule already?

Got through the first 2 minutes. Reminds me of Ben Stein. Can you give me a synopsis?

Nvm. Looks like you're running DWC. Sorry. Didn't load the whole pic before.

Just glare. Good eye though.

Thanks. Still checking everything out. Friend just turned me on to Oregon seeds. They have the arcata cut too. Been trying to find details.