I'm having some trouble keeping my temperatures below 80 F, but does this seem bad enough to be concerned?

[growbot]

I'm using RO, so my PPM should be pretty small. Unless I've misunderstood what "PPM" is in this context. I did try to raise the humidity, but it tops out at 55 - 57% because I live in a colder, dryer environment. I have a humidifier going 24/7, and I can probably get it up into 60% if I leave it on the highest setting, but I'm not sure I'll be around often enough to change the water.

I decided to unplug another light in the tent since that pot didn't sprout. It's dropped to 77 F and it might get as low as 74 F. I'll brainstorm permanent solutions, but I want to give her some respite from the heat for a bit.

I have 2 ultrasonic mist makers in a 5 gallon bucket with a lid. in the lid there are 2 holes on roughly opposite sides. Over one hole I have a computer fan hooked up to a six dollar PWM module from Amazon. The PWM module lets me adjust the fan speed, the fan blows into the bucket and blows the humidified air out the other hole. With all 5 gallons and one mister running the bucket does not need to be filled for about 4 days. Depending on your tent you could get a larger bucket maybe. Running one doesent cool the tent but like I said 2 does.

There is also a cannabis study out suggesting that many cannabis strains actually thrive between 77-83 F depending on strain and that 70-75 may be on the low side. I think this is it but I don't have time to read all of it at the moment. If it's not the right study I'll find it for you.

(PDF) Photosynthetic response of Cannabis sativa L. to variations in photosynthetic photon flux densities, temperature and CO2 conditions

PDF | Effect of different photosynthetic photon flux densities (0, 500, 1000, 1500 and 2000 μmol m(-2)s(-1)), temperatures (20, 25, 30, 35 and 40 °C)... | Find, read and cite all the research you need on ResearchGate

www.researchgate.net

 

[AutoWonders]

How low?

12% has not been unusual. These days I am utilizing an evaporative humidifier.

 

[Bantersaurus]

I have 2 ultrasonic mist makers in a 5 gallon bucket with a lid. in the lid there are 2 holes on roughly opposite sides. Over one hole I have a computer fan hooked up to a six dollar PWM module from Amazon. The PWM module lets me adjust the fan speed, the fan blows into the bucket and blows the humidified air out the other hole. With all 5 gallons and one mister running the bucket does not need to be filled for about 4 days. Depending on your tent you could get a larger bucket maybe. Running one doesent cool the tent but like I said 2 does.

There is also a cannabis study out suggesting that many cannabis strains actually thrive between 77-83 F depending on strain and that 70-75 may be on the low side. I think this is it but I don't have time to read all of it at the moment. If it's not the right study I'll find it for you.

(PDF) Photosynthetic response of Cannabis sativa L. to variations in photosynthetic photon flux densities, temperature and CO2 conditions

PDF | Effect of different photosynthetic photon flux densities (0, 500, 1000, 1500 and 2000 μmol m(-2)s(-1)), temperatures (20, 25, 30, 35 and 40 °C)... | Find, read and cite all the research you need on ResearchGate

www.researchgate.net

I'm sure there are strains that can survive in that range, but mine's taco'ing pretty heavily, so I can't imagine it's enjoying it. It does look pretty healthy otherwise. I guess the question is - what's better, 75 F or 84 F?

 

[growbot]

I'm sure there are strains that can survive in that range, but mine's taco'ing pretty heavily, so I can't imagine it's enjoying it. It does look pretty healthy otherwise. I guess the question is - what's better, 75 F or 84 F?

75, because it's pretty safe for everything, even up to 77 is pretty safe, You're probably right about strain dependent and prob even individual plants.

 

[nizmoKush]

My temp averages about 84f and rh around 50. I use silica tho

 

[Bantersaurus]

I'm about ~17 from sprout, so would it be too early to start going with Mega Crop in Happy Frog soil? And when is a good time to start LST?

My temp averages about 84f and rh around 50. I use silica tho

I'm using silica, too, but I'm thinking I didn't give it enough.

 

[Bantersaurus]

How would you guys rate my LST attempt? And does the stem look alright? Seems a little exposed.

 

[PotDaddy]

How would you guys rate my LST attempt? And does the stem look alright? Seems a little exposed.

Give her a few days then readjust the ties. It can seem extreme when you first do it but these plants are amazingly resilient.

 

[Bantersaurus]

Give her a few days then readjust the ties. It can seem extreme when you first do it but these plants are amazingly resilient.

It basically grew around it in 12 hours. I'm impressed by the resilience of the plant.

 

[GeorgeCloney]

@OttoCBD
Otto knows a hell of a lot more about LST than I do
Otto, how many nodes do you grow before starting ?...any advice?