Is 85 degrees dangerous in flowering?

[headbandrocker]

I am 5 weeks into flower and my plants arent filling out like the ones in the colder room. The temp in this room is 85+-
No co2 is being used and the room has a 8" exaust on constantly with 8"booster fan for intake(also leave the door open)I would usually run this room at night to get around heat,and would have intake pulling air from outside . In this set up it is warmer than I like and I'm seeing smaller buds with fewer crystals than I should at week 5
Is 85 degrees way to hot?

 

[vostok]

85c is 185f thats too hot for man or rock, unless you are a cosmonaut..? but 85f is a mild walk in the park at 29 and a half Celsius ..your Sativa strains will love your for it, I can only think that the input temp, your local temp outside is too high, but 85 f is an easy temp to grow in, avoid having the temps in the 90f for any length of time..

 

[headbandrocker]

Heres a shot of the ladies ,the room has been 85 the whole run

 

[headbandrocker]

 

[headbandrocker]

Turned on dehu and it's 80 for night cycle ,is that dangerous?

 

[mrCRC420]

80 isn't dangerous, 90's is dangerous. 80's will slow your growth rates due to stress. It's not good, but your plants will live; just slower than they should. 80 for day temps is not ideal; it's a tad high; but not dangerous.

 

[skunkd0c]

80's will slow your growth rates due to stress

85f is ideal for a well kept hydro garden although indoor soil plants do tend to like it cooler

 

[purplehays1]

85+ for more than 1-2 hr a day will stress certain strains, others it is just fine. If you have plants that dont tolerate it well and u cant lower the temps, run a different strain, hard to tell you from the pictures. I had a strain called True OG that i ran 3 times. Once i vegged at 85-95 degrees (hot summer no choice) and she grew great, then flowered at 80-90 (only 85+ for like 4 hrs a days) and the yield was the best if the 3. Some bitchs like it hot, others will straight wilt and hate you at 85-90 degrees.

 

[ttystikk]

All these comments and no one mentioned RH? For shame!

If your RH is above 60% the plants will thrive on temps in the mid 80s, but they will suffer if RH is too low. This is independent of adding CO², although CO² will certainly bring big dividends in a high temp, high RH environment.

From the sound of things, you have an RH management problem as much as a temp problem. Adding some daytime humidity will help both considerably, I use a swamp cooler to maximise the effect.

Another thing to do to help manage summertime temps is to extract air from the room as close as possible to the lamps themselves; this minimises convective and conductive heat gains in the space. I used a length of 8"exhaust duct and placed the opening right behind the socket carrier of my wide open adjust-a-wing and the room hardly warms up at all under the HPS thouie in it.

From both a heat management as well as a lighting engineer's perspective, it's a fool's errand to blow cooling air on bare bulbs. Try to avoid it as much as possible. Sucking the exhaust air from nearby is another thing and is just as often recommended.

 

[headbandrocker]

Thanks for the reply!
I can keep the RH AT 55% just by turning off the dehu
I am pumping ac treated air /co2 treated air into this room now,and wonder If there is any benefit to treating both spaces as one,ie the room with co2 /ac acting as a 24hr lung room. I believe I would need one fan pulling from each room and into the next. Co2 would be on 24 hrs aswell as co2..
Would this be ok ?

 

[urgod]

bare HID bulbs is like barebacking. being that close to the plants is asking for fire... unless those are CFLs lol

 

[headbandrocker]

Barebackins preety awsome though lol...but I would never use a cfl unless it was to see better in a coat closet.
plenty of folkes run bare bulb hids and do great and don't burn there gardens down.. The plants seem to love the light,I would however add I will not run another 85f room,slows down growth ....they just don't like it :/ 75 f was my best results.

 

[purplehays1]

Barebackins preety awsome though lol...but I would never use a cfl unless it was to see better in a coat closet.
plenty of folkes run bare bulb hids and do great and don't burn there gardens down.. The plants seem to love the light,I would however add I will not run another 85f room,slows down growth ....they just don't like it :/ 75 f was my best results.

ya some strains def will not like 85 degrees, others love it. 85 is pretty much the threshold above it most plants get unhappy, but its totally fine with most sativa strains.

 

[headbandrocker]

The wifi alien is not loving it right now. I was told bare bulb 600 distance should be 8-10" away from plant tops(lights are on mover)
But I backed em off to 10-14 " away for 2+ weeks...
And now are at 8-12" away The plants closer to the light are doing better than the ones just a short distance away...
I don't know if the slower ripining buds are due to heat in growroom(cookies and bubba,and Larry og look great tho) or I have the bulb to close or too far away.... I am going to turn my exaust into an intake with filter and see if I can drop temps a bit....
I can get my hand really close to the lights with out them being to warm....I believe I should be growing plants right outside this distance....
Any feedback on bare bulb on a mover distance to plant canopy?

 

[headbandrocker]

If heat is the issue should I just give them longer to ripen or is the damage done? I have seen a few naners on the wifialien,but some of the wifis in the top growing rack(furthest from any light ) are doin best?? They look like there supposed to... I'm stumped

 

[hydroMD]

Thays too close for a bare bulb unless your ambient room temos are mid 60's! Im guessing if you put your thermometer 12" from a bare bulb your pishing mid 90's. If the plants further away look good maybe thats telling you something. Too hot or too close.

I run open hood 600's aboit 18" from canopy due to heat. 1000s i keep at about 32".


Only time ive ran a 600w light 12"is when im venting hoods amd doing a single plant.

 

[Wilksey]

Thays too close for a bare bulb unless your ambient room temos are mid 60's! Im guessing if you put your thermometer 12" from a bare bulb your pishing mid 90's. If the plants further away look good maybe thats telling you something. Too hot or too close.

I run open hood 600's aboit 18" from canopy due to heat. 1000s i keep at about 32".


Only time ive ran a 600w light 12"is when im venting hoods amd doing a single plant.

Agree.

That bulb looks WAY too close to those plants.

 

[purplehays1]

The wifi alien is not loving it right now. I was told bare bulb 600 distance should be 8-10" away from plant tops(lights are on mover)

I am running a 400w and when i had it bare bulb i couldn't get anywhere near 10 inch. I dont think 10 inch from a 600w is going to work try like 14"

 

[PatchKid]

I try not to get above 80 but my first plant I grew loved the higher temps.... guess it depends on strain

 

[headbandrocker]

Even though lights are moving on a lightrail ? The bulb doesn't spend much time in front of the plants ...
Hmm so I will try 14" my light rail moves 5+ ft are you sure they will get enough light?