Dropping Temps During Flowering.

Guitar Man said:

I'm enjoying this Thread, as I have been very curious about temps during flowering. Makes total sense to lower temps as the grow matures.

I do have a question about your grow; I'm not trying to be critical, but your leaves seem to be showing nute problems earlier than they should be. How far into flowering are you?

Here is a picture of 1 of my plants that was 6 weeks into flowering. I do have some leaves turing color, but lots of green still left.
.View attachment 2525246

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Yea, I had a bit of a cal/mag issue from going a bit light on the nutes during weeks 2 and 3 of flowering. I have since upped the feeding a bit and it seems to have stabilized so far. Only 2 of the plants seemed to want a bit more than I was feeding. Great learning experience overall. Got a new camera, going to play around a bit with it tomorrow and see if I can get some decent upclose shots.

Peace

Asmallvoice

Hello all,

After a week at 72 and 62, I dropped it down to 70 and 60 for this week and I may drop it a couple of more depending on the weather over the next few days. So far things are going okay. I was able to take a few pics without the HPS light on. Had to install an upgraded carbon filter, so I did a shut down to relocate the plants out of the room while I did my work. New camera as well, going to get a tripod for it so I can get some knarly pics coming.
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Peace and Great Grows

Asmallvoice

ASMALLVOICE said:

Yea, I had a bit of a cal/mag issue from going a bit light on the nutes during weeks 2 and 3 of flowering. I have since upped the feeding a bit and it seems to have stabilized so far. Only 2 of the plants seemed to want a bit more than I was feeding. Great learning experience overall. Got a new camera, going to play around a bit with it tomorrow and see if I can get some decent upclose shots.

Peace

Asmallvoice

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The reason I brought this up is, your test won't be completely accurate because of nute problems early on. But I still agree, lowering temps should encourage a more natural bud development. BTW, your plants do look good and juicy!!

ASMALLVOICE said:

Hello all,

After a week at 72 and 62, I dropped it down to 70 and 60 for this week and I may drop it a couple of more depending on the weather over the next few days. So far things are going okay. I was able to take a few pics without the HPS light on. Had to install an upgraded carbon filter, so I did a shut down to relocate the plants out of the room while I did my work. New camera as well, going to get a tripod for it so I can get some knarly pics coming.
View attachment 2527467View attachment 2527472View attachment 2527477View attachment 2527478View attachment 2527479View attachment 2527482View attachment 2527473View attachment 2527474View attachment 2527475View attachment 2527476View attachment 2527469View attachment 2527471

Peace and Great Grows

Asmallvoice

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Nice looking ladies.. I always drop my night temmps close to the end of flower, with the last 3dys being total darkness and lower temps.
And before anyone chimes saying thats bs.. Tell it to Mnistry of cannabis, they're the breeder who recommends to do this.

Guitar Man said:

The reason I brought this up is, your test won't be completely accurate because of nute problems early on. But I still agree, lowering temps should encourage a more natural bud development. BTW, your plants do look good and juicy!!

Click to expand...

Yea, the two plants, 1-WW and 1-J23 showed a later stage of a cal/mag def. and being my first grow, I eased into upping the nutes over 4 feedings but the rest were okay with the original doses (7 plants total), but to keep things simple, I make one batch and everybody gets the same mix. I know I have a couple that are getting close to done and the rest will hopefully finish up over the next 4 weeks as well. Got the trusty little 40x mag glass with uv/led light that gives this old man some visions...lol Here is a couple of pics of the freebies (almost 4 weeks flowering), I have been told it's a strain of some type of kush, I honestly have no idea. Care to take a guess?, let me know. The frost build up is getting unreal, going to get my tripod today and see if I can get anything REALLY worth sharing from this camera..lol


Thanx again for the replys folks.

Peace and Chill Grows

Asmallvoice

*opinion*

I have found nothing that leads me to believe lowering temps is beneficial.
I do not try to imitate outdoor conditions, why?

Light angles, high heat, low temps at night, humidity, dry periods, rain, hail, wind, dust, dirt pests...

All I got from lowering my temps was some powdery mildew.
Come to find out that powdery mildew does best in temps between 60 and 70. One week of that was enough.

I'll just stick to trying to keep my plants as close to 75 at all times as possible.

Trousers said:

*opinion*

I have found nothing that leads me to believe lowering temps is beneficial.
I do not try to imitate outdoor conditions, why?

Light angles, high heat, low temps at night, humidity, dry periods, rain, hail, wind, dust, dirt pests...

All I got from lowering my temps was some powdery mildew.
Come to find out that powdery mildew does best in temps between 60 and 70. One week of that was enough.

I'll just stick to trying to keep my plants as close to 75 at all times as possible.

Click to expand...

Are you positive the mildew came from lowering your temps? What was/is your humidity? Do you live in an area prone to mold/mildew?

Trousers said:

*opinion*

I have found nothing that leads me to believe lowering temps is beneficial.
I do not try to imitate outdoor conditions, why?

Light angles, high heat, low temps at night, humidity, dry periods, rain, hail, wind, dust, dirt pests...

All I got from lowering my temps was some powdery mildew.
Come to find out that powdery mildew does best in temps between 60 and 70. One week of that was enough.

I'll just stick to trying to keep my plants as close to 75 at all times as possible.

Click to expand...

Hiya Trousers,

I keep the humidity as close to 50% as I can, being winter tho, it runs a bit lower than that right now. The last few days it has barely hit 40%. I have 2 circulation fans going 24/7 and a bit overkill on the carbon filter scrubbing, but thats me. I must add that when the lights go out, I do not try to slam them to my lower setpoint, it takes roughly 4 hrs to come down to my lights off temp and it helps on the potential spike in humidity.
I am just about as low as I am going to take them as of right now. I will say this as a side note, it sure has been a helluva lot nicer to work in there as of late..lol

Peace and Great Grows

Asmallvoice

Nothing wrong with your humidity being 40% this far along in flower. I drop mine down to 25-30% the last couple weeks. It get's them nice and sticky. Plus, you don't have to worry about mold.. Nice grow.

Guitar Man said:

Are you positive the mildew came from lowering your temps? What was/is your humidity? Do you live in an area prone to mold/mildew?

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I didn't lower my temps, it was a cold snap we had. I grow in my basement. My humidity is usually between 10% and 35%.
Mold is a completely different thing than mildew. It is possible I brought in mildew from my greenhouse.

Powdery mildew does best between 60 and 70. It can not grow at 77 or above.

ASMALLVOICE said:

Hiya Trousers,

I keep the humidity as close to 50% as I can, being winter tho, it runs a bit lower than that right now. The last few days it has barely hit 40%. I have 2 circulation fans going 24/7 and a bit overkill on the carbon filter scrubbing, but thats me. I must add that when the lights go out, I do not try to slam them to my lower setpoint, it takes roughly 4 hrs to come down to my lights off temp and it helps on the potential spike in humidity.
I am just about as low as I am going to take them as of right now. I will say this as a side note, it sure has been a helluva lot nicer to work in there as of late..lol

Peace and Great Grows

Asmallvoice

Click to expand...

I do not bother messing with humidity, it is not that important. I prefer it lower. I do not want my fatty buds getting mold in them.

I have not found anything to convince me that lowering temps indoors or raising humidity is beneficial, much less worth the effort.

gebberellic acid and making femized seeds? computers baffle me, and am new here. speaking of gibberellic acid. i was on some site and did not save. but the info said spray a solution of 300 to 400 ppm (from recall) on buds 5 days? as i recall it was 300 to 400 parts per million. and if the water and gebberellic acid were to few or to many parts per million bad things would occur. help, or a link to some site? PLEASE AND THANK YOU.

LB

Great thread. Im battling very high heat in my flowering due to a tight space and 600 watts HPS... I just cant seem to get the temps lower then 85 on a good day... Has anyone some factoids or experience flowering in excessive heat such as 85-100F? Any tips (other then "TOO HOT" ) would be appreciated..because I know its hot...but I just really cant lower it...Iv tried....( Day 16 of flower on some pretty good bag seed - 3x3x8 - with AC running during day cycle ) I know... I know... its warm... Watt 2 DEW?

Hello All,

Been fishin my ass off and watching these Ladies finish up. They are coasting at 68 on and 58 off at roughly 40-50% hum. Been fairly decent here the last couple of weeks on humidity, my dehumidifier is catching a well deserved rest...lol. Here are a few shots, I harvested my oldest WW and have it in the dry room.


Wont be long now.

Peace and Great Grows

Asmallvoice

Interesting thread about temps =)
I swear I have been debating forever about colder temps and humidity with my peers forever despite proving my point.
What I have found in my instance, colder temps are generally more beneficial in many ways and outweigh the positives.
I live in an extremely warm & humid climate, so I run an A/C cooled room at 20C for entire operation (clone, veg and flower... even drying)
*The res stays at 20C - no root issues
*Plants grow at the same speed as higher temps

I use a good 20L per day dehumidifier and keep RH at around 25-30%. It makes things a bit harder with low temps (stripping water from the air), but with a good dehumidifier and good circulation it's not a problem. The benefits with end production of buds vs happier veg/growing temps, the buds are much better colder (and yield)
The rooms are divided by light, but the air circulation is the same all round. I spray the clones with 'stop wilt' instead of doming them, works much better for me, better success.

The advice I would offer for anybody wanting to run a colder room, just keep the RH as low as you can, keep the fan blowing around really well and in my case (but not necessary) use a UV-C light in your grow room. Yes they are dangerous if used incorrectly, so if you were thinking about using one, RESEARCH and put your SAFETY FIRST!
But in the final 3-4 weeks of flowering I give all the plants a 'scan' with the light every second day and never ever have a bud rot or PM issue since. I use overalls, gloves and a UV face mask. ( I don't let the light touch my skin)
Even just putting one deep in your intake will do good things, but like I said RESEARCH and SAFETY FIRST!

Sorry if it feels like I pulled off topic a little bit, but the relevance was that when I originally dropped the temps, humidity issues and related diseases increased. But if you can control them, you will end up swearing by lower temps like me =)

Cheers Jimmy.

Guitar Man said:

I'm enjoying this Thread, as I have been very curious about temps during flowering. Makes total sense to lower temps as the grow matures.

I do have a question about your grow; I'm not trying to be critical, but your leaves seem to be showing nute problems earlier than they should be. How far into flowering are you?

Here is a picture of 1 of my plants that was 6 weeks into flowering. I do have some leaves turing color, but lots of green still left.
.View attachment 2525246

Click to expand...

Mine are down to the low 50's at night and some times high 40's... first night was last night.. and its about to be like that the rest of the season at night 40's to 50's

#DPP said:

Mine are down to the low 50's at night and some times high 40's... first night was last night.. and its about to be like that the rest of the season at night 40's to 50's

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Do you also practice necromancy in your chilly grow room??

Totally new to the craft and love reading and learning here. I am in week 9 now. Dropped my temps from 83 daytime, to 78, and the night temps from 78 to 69. The calix were all red prior to the drop and seemed to be stalled out. But a couple days after I dropped my temps, the flowers produced a huge burst of new, white calix. Again, I'm new to this, but with no other changes in the room, it seems evident that temperature drops like this improve growth, and maybe potency and flavor, too.
Thanks to all who post and share here. The love is good.

ASMALLVOICE said:

Yea, I had a bit of a cal/mag issue from going a bit light on the nutes during weeks 2 and 3 of flowering. I have since upped the feeding a bit and it seems to have stabilized so far. Only 2 of the plants seemed to want a bit more than I was feeding. Great learning experience overall. Got a new camera, going to play around a bit with it tomorrow and see if I can get some decent upclose shots.

Peace

Asmallvoice

Click to expand...

Thank you for starting this thread. I just dialed down my thermostat a bit and my wife is wanting me to hold her. Two birds, one stoner.