PROBLEMS WITH A HYBRID SETUP.

Hi all. Im doing an indoor grow through the winter to supply my moms meds for the year again and this I wanted to try something different. I have my plants in a 10'long x 5' wide x 7' tall in an all organic soil grow. I started with eight 300watt LED 11 band Apollo grow lights and the temps were steady at 77 degrees F. I added two 400 watt HPS bulbs with regular ballasts in there today. The temps now are steady at 93 degrees F with fresh air intake from outside and a huge fan extracting. Is 93 too high and will it screw everything up? Should I just unplug the HPS and stay with just the LED lights? Im worried cause my plants are 4 weeks into veg and still have 4 more weeks up veg before I flip and I don't want to kill them with the heat. Has anyone had negative affect with high heat in their grow room? Summer days usually reach the high 90s so is it kinda the same in the room? Also my humidity dropped from 26- 30RH constantly down to 15% RH, is that gonna be another problem? Unplugg and stay with the LEDs or just run it? Help me out guys Im uneasy about this. Thanks everyone.

that is too hot. 75-80 is where u need to be
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butsack said:

that is too hot. 75-80 is where u need to be
.

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Im not questioning you but just wondering about natural climate. Summer heat gets into the 90s and 100s in most spots during the summer so is that a valuable argument or am I just hoping someone to tell me what I want to hear?

out door is a different animal
is your intake passive?
I'm not sure about your humidity, because I have the opposite issue. (90+)

butsack said:

out door is a different animal
is your intake passive?
I'm not sure about your humidity, because I have the opposite issue. (90+)

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I have a 6" 450 cfm fan in the attic pulling air through a 6" flex duct that goes into my tent that's connected to a Phresh Carbon Filter on the top center of my tent. I have a 6" flex duct connected to the outside that's sealed so only fresh air comes in that the fan sucks the air in from to cool the tent. salso a bunch of fans inside the tent.

It doesn't matter how many fans or what your cfm is if your incoming air is hot. The fans help with temperature differential. Meaning more cfm, the closer to the incoming air.

Are you using air cooled reflectors?

I've read THC rapidly degrades somewhere in the mid 80's (cant remember exactly.)

- Jiji

jijiandfarmgang said:

I've read THC rapidly degrades somewhere in the mid 80's (cant remember exactly.)

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I believe it's 85 degrees but with co2 your good up into the low 90s

You need to get an a/c. When growing, you cannot let price be an object. Unless you don't have an air cooled hood like jiji stated then I would just decide between one or the other... or both

You want a range of 50-60% r/h for flower and you can let it go a little higher in veg. A humidifier and possible a dehumdifier are needed for optimum results. I would say if you cannot afford any of these just go with the led or a 400w hid instead of all three. I would take a couple of oz of bomb over a pound of airy loose low grade any day of the week.

that 6" 450cfm fan should be enough to cool your 2 400w lamps, if you had a couple sealed hoods, or cool tubes. that would keep your temps around 80

I read this. Its was in multiple sources over the web. Whats you guys's take on this one.

Proper temperature is one highly variable factor. Most books state optimum grow temperature to be 70-80 degrees, but many list extenuating circumstances that allow temperatures to go higher. Assuming genetics is not a factor, plants seem to be able to absorb more light at higher temps, perhaps up to 90 degrees. High light and CO2 levels could make this go as high as 95 degrees for increased growth speed.* An optimum of 95 degrees is new data that assumes very-high light, CO2 enrichment of 1500 ppm and good regular venting to keep humidity down. It is not clear if these temperature will reduce potency in flowers. It may be a good idea to reduce temperatures once flowering has started, to preserve potency, even if it does reduce growth speed. But higher temperatures will make plants grow vegetatively much faster, by exciting the plants metabolism, assuming the required levels of CO2 and light are available, and humidity is not allowed to get too high.

"Studies indicate the potency of buds goes down as the temperature goes up, so it is important to see that the plants do not get too hot during flowering cycles." You're ok for now but this needs to be addressed by the time you induce flowering. This is from the same article and I trust Rosenthal.

Big Trees said:

"Studies indicate the potency of buds goes down as the temperature goes up, so it is important to see that the plants do not get too hot during flowering cycles." You're ok for now but this needs to be addressed by the time you induce flowering. This is from the same article and I trust Rosenthal.

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Awesome thanks brotha. I'm going to get another fan and set it up so that when the fan that's pulling air out kicks in, I'll put a fan in the duct that brings in fresh air and it will kick on at the same time blowing air in. That's all I can think of other than temps here in the next few weeks will be dropping quite quickly for the winter and instead of it being 60 day and 35 night it'll be 30 day and 20 night. Plus I switched my timer to come on at 5 pm and off at 11 am . I figured that's as close as I can come to the coldest parts of the day.

Ya, I forgot about the whole winter thing lol. An a/c would look pretty ridiculous on the same house that some guy is shoveling snow outside of lol.

please only post if youve grown in these temps before. misguided info is trusted way too much these days.
cpappa...ive had temps of 100 for weeks during dead of summer and plants grew just fine. i dont recomend it but it happens. dont foliar feed and put a fan to blow on the bulb. you need to water often with half nutes. keep all your lights running youll be fine. youll gain knowledge at least

Big Trees said:

"Studies indicate the potency of buds goes down as the temperature goes up, so it is important to see that the plants do not get too hot during flowering cycles." You're ok for now but this needs to be addressed by the time you induce flowering. This is from the same article and I trust Rosenthal.

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Big Trees said:

Ya, I forgot about the whole winter thing lol. An a/c would look pretty ridiculous on the same house that some guy is shoveling snow outside of lol.

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In Canada, having an AC on when people are shoveling snow isn't too much of a stretch. Neither is wearing a parka coat in your boxer shorts to run out to warm up the car in the morning.

-spek

theking2202004 said:

please only post if youve grown in these temps before. misguided info is trusted way too much these days.
cpappa...ive had temps of 100 for weeks during dead of summer and plants grew just fine. i dont recomend it but it happens. dont foliar feed and put a fan to blow on the bulb. you need to water often with half nutes. keep all your lights running youll be fine. youll gain knowledge at least

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I'm from the north so I've grown in the climate. 100 degrees won't kill them(it is a weed after all) but it's really bad for them if you care about quality. He's only in veg. If this shit continues the flowering cycle would be quite a stressful experience. I just forgot that when you guys open your windows, the house gets cooler(my bad) lol. But still I stand by my statements regarding temperature.

[QUOTE="spek9, post: 11037713, member: 582769"Neither is wearing a parka coat in your boxer shorts to run out to warm up the car in the morning.[/QUOTE]
I've done that lol. The car is always so goddamn cold when you first step foot in it and I've never been a morning person so its not a good combination.

I put an inline 6" fan in the duct that just lets in fresh cold air in. When the temp fan turns on, the inline fan turns on and blows cold air in helping the other fan. My temps have gone from 93 to 86 F . Is that a safe temp at 86 F with a RH of 20?

You should be fine