Short plants

[oldsmokey]

So I'm running a metal halide bulb right now at 50% so about 500 watts here is my leaf temperature.

So just like you said around 70% humidity is where I should be. I have the humidifier inside the room the extractor fan is running on low fresh air it is just passive right now and a 12in oscillating fan for circulation. I also have a wall-mounted 16 in oscillating fan 41 things get hotter. I would be really surprised if it got up to 70%

 

[AdaminCO]

So I'm running a metal halide bulb right now at 50% so about 500 watts here is my leaf temperature.

So just like you said around 70% humidity is where I should be. I have the humidifier inside the room the extractor fan is running on low fresh air it is just passive right now and a 12in oscillating fan for circulation. I also have a wall-mounted 16 in oscillating fan 41 things get hotter. I would be really surprised if it got up to 70%

 

[AdaminCO]

Do you have an exhaust hood for the light?
Is it pulling from above the light?

You could come up a bit on temp a bit, but that won’t help the RH. What’s your ambient?

 

[oldsmokey]

Just a parabolic shape exhaust is pulling above the light through a 24 inch carbon filter although not connected to the filter at the moment. if you go over to my journal there's some pictures in the first or second post of my grow room.

 

[oldsmokey]

If you go hear I posted some pictures of my last crop.

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[AdaminCO]

Just a parabolic shape exhaust is pulling above the light through a 24 inch carbon filter although not connected to the filter at the moment. if you go over to my journal there's some pictures in the first or second post of my grow room.

Is that 6” on the floor your only (forced) intake for the room?

 

[oldsmokey]

Ya that's the only fresh air

 

[AdaminCO]

Ya that's the only fresh air

Not saying you have a problem, but usually (at least in rack fabrication) you don’t want forced intake. You need the reverse pressure for the exhaust to pull properly. I have the same inline, but on the back side of the exhaust pulling air from the tent. There’s a booster in between that and the filter. I think I run 28”.
Then I have all 3 floor vents open, maybe 200 sq.in. for venting. I bet if you cut in two 4-6”x12” rectangles (covered with screen) on each side of your room, you’d definitely have better flow.
Where does your intake pull from?

 

[AdaminCO]

Ya that's the only fresh air

Put both fans on the exhaust side and pull some fn air through there.

 

[oldsmokey]

Sorry my mistake the fresh air intake is 4 in. Not 6 in it's just running passive the fan is not running only use that when things get warmer. 6 inch extractor fan I planned it that way to make sure I have a negative air pressure. That's one of the conditions with my wife she don't care what I do down there long as she don't have to see it or smell it lol. I understand what you're saying with unrestricted passive airflow would be much better. But I have to keep the Smell down and with everything running all the fans there is plenty of airflow in there. Fresh air is drawing from the other side of the basement next to where the fresh air return comes in. I've had people in my basement before right next to the grow room with it running in full flower and you would never know it's totally stealth.

 

[oldsmokey]

@Virandell my apologies for hijacking you thread never meant to do that

 

[oldsmokey]

Put both fans on the exhaust side and pull some fn air through there.

The extractor fan is 350 CFM and it's only running on low now. But come flowering time when I'm running the ballast at 100% that might be a good idea.

 

[Virandell]

Try to stay close as possibly to this.
(This is leaf temp, not ambient)

This will help you guesstimate.

Thanks alot buddy appreciate it )

 

[Virandell]

@Virandell my apologies for hijacking you thread never meant to do that

Nah mate no worries at all haha jealous of your humidity but was nice to look at your plants my English is not perfect so maybe it just sounded bad

 

[bobrown14]

Topping will reduce yields. There ya go.

Biomass is yields. Reduce biomass by chopping plants (topping) and stall plant growth = more time to harvest date and less biomass (yields). Common sense.

 

[Virandell]

Topping will reduce yields. There ya go.

Biomass is yields. Reduce biomass by chopping plants (topping) and stall plant growth = more time to harvest date and less biomass (yields). Common sense.

What u reccomending then lst ?

 

[oldsmokey]

I would say it increases the length of time needed for your grow. At the same time increasing your harvest

 

[bobrown14]

LST works sure. Supercrop works when the plants reach the lights. I regularly supercrop my not topped plants usually are 6-8' (feet) tall grow lights at 7' so training required (usually). Depending on strain - genetics are at play for sure and when you top plants you've never grown before you have no idea how they are going to react.

Topping is bro-science.... its nothing to do with horticulture. Sorry... it is what it is. Right up there with flushing.

 

[oldsmokey]

It's one of those questions where you will get a thousand different answers. You need to weed through all the replies and decide what you want to try and with experience you would develop your own style and what works best for you.

 

[Lpena007]

Hi guys I have question about short plants I made lst/topping (same like last time but I dimmer my light to higher power on 12/12 so they didn't stretch that much but I think I overdone it) I wonder if they are that much shorter (last time they been about 5"-8" taller same strains) it will affect any yield? All of them show sex

Genetics, don’t worry