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Look almost like something got on that leaf. Overall color looks healthy.
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Nothing to be concerned with Growmie, we all get a few blemishes 
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Your plant will continue to shed its lower leaves. It’s normal.
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I see very light calcium deficiency starting, but not bad. May need a shot of cal mag if other numbers are in line.
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Bottom shedding, I’ve been trimming mine off. Looking good 
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Should I cut those leaves off?
You can. I just let them fall off.
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I need a tds meter rn I’m just guessing. I only have a PH pen at the moment
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@Lostgirl I posted pics with more natural lighting here
The plant looks a lot better in the pictures above than the other. I don’t see as much yellowing. Get that PPM pen!
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I just ordered that ppm pen. Hopefully it comes in tommorow. What temp should the tent inside be? Do autoflowers prefer warm over fresh tent?
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During vegetation stage I like to keep my tent 75 to 79° and a relative humidity of 70%
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When do you think an inline fan is necessary? I’m currently in week 4
For the most part yes, it really depends on your setup. I personally don’t use one. Since I grow autoflowers my tent stays open 24/7 however, I have more air flow in my tent than any exhaust fan could ever provide.
I have seven fans blowing in and around my tent at all times.
I have two small 6-in fans blowing in to each floor vent at the bottom of my tent.
I have 4 oscillating fans one on each Pole in my tent. 2 blowing directly at the girls and 2 blowing all around the tent.
I also have a big floor fan blowing into the tent from just outside the door of the tent.
Keep in mind air flow is one of the top three things that you must have inside your tent.
You must replace the stale air with fresh air at all times.
If you don’t have a 
ton of the correct fans as I do then a exhaust fan and intake fan would be necessary.
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If you’re going to continue with this hobby you’re going to need a really good light, lots of air flow, heat, air condition, dehumidifier, and a humidifier. Controlling your environment properly is the key to a successful grow without a proper environment your plant will suffer
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Right now I have a Vivosun Tent, Viparspectra 250 watt light, Oscilating Fan, Apera 20 PH Pen, and one PPM pen coming in.
How big is your tent? Understand that providing good circulated fresh air throughout the entire tent is important. It dictates your temps and humidity. It all has to work in sync to provide the perfect environment. We’re going into summer months so you’re going to need to provide cool air into the room that your tent is in. If there’s a window near your tent I suggest a window unit for air condition along with your central air. Growing in the summer is very difficult to keep your temperatures down.
Also, I buy little space heaters that I can set the temperature to whatever I need and put it in my tent it doesn’t take up no room. I use this one
Let’s say I need it to be 75 at all times in my tent. During the summer I run my air and when it gets too cold the heat kicks on heats it up to 75 and turns it off by itself. It works in harmony.
This is a good one to use too I bought this last year
Heating is really not going to be your issue it’s going to be air condition. You want the room that you grow in to be as cold as possible as the summer heat is going to keep pounding at your house raising the temperature higher and higher in that tent. I have central air that’s set to 69° to keep my house comfortable and then I have a window unit inside my room that I grow in that even pulls down the heat and cools it off a lot more.
You’ll need a decent humidifier I wouldn’t spend $25 I would spend $69 and get a good one. I wouldn’t buy any dehumidifier for less than $125 none of them work they’re all horseshit. Get a commercial dehumidifier you can pick them up at Goodwill or thrift stores between $15 and $30 this kind the way that you regulate your basement with.
Just don’t buy those $39 ones they don’t work
These little 9-in box fans with three speeds for $14 at Walmart is a weed growers best friend. They’re powerful and they kick the air around your tent tremendously. I’ve got like five on them
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I’m using a 4x2 grow tent and it remains closed at all times
