RacrX
Member
72 is fine. Much better than running at 80. 80 82 isnt ideal for x lights and this temp for that light etc..75 is ideal for the plant under any light.
growing with hps on flowering above 28c / 82.5F will it reduce potency
- Thread starter Skyhound
- Start date
That's correct if under LEDs, HID your leaf temp is above ambient at canopy level, due to the infrared put out by HID.Leaf temp will normally be about 3 C less than ambient. So far you have nuthing to worry about heat wise.
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That’s just a Ignorant statement.
You need nighter temps with LED.
That’s a proven fact.
Skyhound
Well-Known Member
im running them now at 73.4 , what do u think it will be the problem ??
Lucky Luke
Well-Known Member
I run CMH and my leaf temp is always under canopy temps. I use an IR gun.
RacrX
Member
Proven fact huh?!?! What exactly is a proven fact? What are you even saying? I think you're confusing light intensity with ambient temperature. Like i said, keep the ambient at about 72 to 78 with 75 being ideal, and intensity will not come into play anyhow. If your ambient temp is between those numbers regardless of the type of light you're using the plant WILL be happy assuming all other parameters are in check. I surely wouldn't try to over compensate for slightly lower surface temps by increasing my ambient temp beyond acceptable levels. This can cause perspiration and co2 uptake issues which are unaffected by light type or slightly lower surface temps but are instead caused by high ambient room temps with some affect possibly coming from low humidity as well. High heat is the number one destroyer of noob grows. If you have the ability to run at 78 constant with leds and that puts you at a perfect surface temp great. If you have co2 and you can run a little hotter ambient to get your surface temp where you like it great. But if you're the op either running hot ambient or a tad low surface, ill advise to run low all day long. Ambient temp is far more important than surface temp. You do not need to run leds at a higher ambient temp to compensate for surface temperature and there are no facts as you say to refute that. Unless you're running at 75 two inches away haha then surface temp becomes a huge concern
If I run 78f with led. My leaf surface temp is 74-75. Will it work. Yeah. But you should be a little higher with the ambient air temp. To get the leaf temp up.
HPS has IR. And leaf temp won’t be so low compared to ambient air temp.
Not sure how to explain that any simpler
HPS has IR. And leaf temp won’t be so low compared to ambient air temp.
Not sure how to explain that any simpler
Skyhound
Well-Known Member
Guys for example , if i search on google for a good range of temperatures when flowering with HPS without co2 i can easily get an awnser , i have a range to work from 18c / 65f to 26c / 79f , if try to search for leds temps and ask on forums for a range of good temperatures , im only getting 28c / 83f is ideal , ok i get that , but is 22c / 71.6 f still in the ok range or will i have some sort of trouble , like :
Lower potency,
Lower flower volume
Less terpenes
deficiencies
Cooler temperature with result in slower groath and probably a smaller yield.
Will it be in drastic perportions? No, but will effect things nonetheless. And be noticeable. I lowered my veg tent temps to 70-72f for growing lettuce. Only had one weed plant in the tent but It definitely grew slower. But was still healthy and happy.
RacrX
Member
I run my flower room at about 75 give or take a couple degrees depending on my thermostat at any given time. I keep my house between 64 and 66 generally. Just for some anecdotal insight.
I do not think you will see any noticeable shortcoming brought on by running at 71 day time. I could be wrong, but 71 degrees is not cold enough to inhibit metabolic functions so i don't see why there would be a noticeable difference brought on purely by temp. Lower temps actually improve bud quality as well provided you are in the range of acceptable day temps (imo 68 to 78 ). Something to consider though is it becomes harder to hit a ten degree variation between night and day and that is where any perceived difference may actually come from. If im running at 71 i would try to keep my night temp at about 64 to maximize the potential variation at my disposal without going into temps that are too low at night(62 or lower). what do you think about day night variations bookkush??
One small thing you can do to help if even just a little when you're running a bit on the lower side, is raise the plants off the ground just a couple inches. Especially if you're growing against concrete in a basement.
Soul Dwella
Well-Known Member
15 degrees between lights on and lights off temp is optimal, no?
Jjgrow420
Well-Known Member
its kinda pushing it a bit. 15° is more like the max it should vary.
RacrX
Member
agree with jj ..15 is pushing it for me. In part due to my own constraints. i like to aim for 10 that way if im off by a degree or two i have some wiggle room. If i were running co2 thus a hotter flower room then id be a lot more comfortable hitting a 15 degree variance. as it is my room sits around 75 to 77 so taking it down 15 would put me below where i like to see my night temps, about 64.
osowhom
Well-Known Member
and here i have been keeping my room 77 day and night so you are saying a differential is a good thing usually only in the last 2 weeks of flower i lower it at night
V256.420
Well-Known Member
Grown under a 600 watt Hortilux hps running @ 660 watts @ 85 degrees.
Lemon Tree
and a whole tent of Lemon Tree @ 85 degrees in a 4 x 4 tent
Please don't spread untrue information. It bothers me immensely
RacrX
Member
generally speaking yes. there are some advanced methods in which creating a reverse differential may be useful to limit stretch and may be more useful in other plants. Here is a good article showing some differences between keeping no differential or a +/- one
Temperature Integration - Greenhouse Product News
Plant development is primarily a function of temperature; crops develop progressively faster as temperature increases, until some high temperature at which they grow as fast as possible. Some sources of information give crop production times based only on recommended night temperatures. However...
gpnmag.com
RacrX
Member
it isnt misinformation. If that cured out good then imagine what you can do at an optimal temp. imagine the increase in terps if your room was at 75. You also don’t include your region and humidity data nor your co2 levels or light height Or how much air youre moving. so I’ll say it AGAIN the temperature an indoor plant can handle is closely linked to humidity thus water habits as well, and co2 levels as well as light intensity. You absolutely can full on ruin a grow at 82 degrees. simply posting some pictures of non dried bud next to a claim that it grew hot and was fine doesn’t tell me much of anything. nor does it change the fact that you’re not growing under optimal conditions.Grown under a 600 watt Hortilux hps running @ 660 watts @ 85 degrees.
Lemon Tree
View attachment 4863008
and a whole tent of Lemon Tree @ 85 degrees in a 4 x 4 tent
View attachment 4863009
Please don't spread untrue information. It bothers me immensely
V256.420
Well-Known Member
Dried and cured buds
Goji
Goji under a different light
GG#4 S1 from Heisenbeans
Wedding Cake S1 from Heisenbeans
Lemon Tree dried and cured
STFU dickhead and stop telling people they can't grow under high temps. Your claim is shit.
Are you right about lower temps? NO SHIT SHERLOCK.
RacrX
Member
lol what a childish response. And still we don’t have all your other information to come to any type of conclusion about why you’re growing at 85 successfully (by your measure anyhow)
..and You have reading comprehension issues. I didn’t EVER say nobody in any condition can grow a plant over 80. I said that a grow CAN be full ruined by temp in a grow over 80 with a low humidity and high intensity. And that is absolutely true. It’s further true that terps suffer over 80. This is substantiated by laboratory testing, these aren’t MY claims as you say. Why don’t you try growing your little baby buds at 75 and see what an improvement you get. Thank me later. Dickhead.
