am i crazy to raise temp?

chiefrokaho

chiefrokaho

Well-Known Member
Im runnin a t5ho fixture less than 18 inches wide, 4ft, 8 tube, in closet. Bout to add some cfl lights around bottom. I had prob before with heat usin jus cfls. Was thrilled to put ac in room that has closet. Now i have no prob keepin temp in mid to upper 70s. Prob is it jus gets down to bout 70 at 'night'.
How important is temp dif? I would like to be bout 15 degree difference, especialy when i get further in flowerin. Should i let it get hotter durin light on? Jus dont wana get too hot. Am runnin mostly sativas tho.
Any replys are welcome, really like replys backed by experience!
Thx for lookin
 
legallyflying

legallyflying

Well-Known Member
I will let you in a little secret, google will likely answer your questions better than posting here.

But to answer your question in a smart ass way... why the FUCK do you want at least 15 degree diff? Your post should have said.. I'm pimp as hell now as my diff is less than 10 degrees and everyone knows that a lower temp diff prevents stretching, and stunting do to overly cold evenings.
 
Sand4x105

Sand4x105

Well-Known Member
Google search brought up this old thread:


https://www.rollitup.org/advanced-marijuana-cultivation/333645-day-night-temperatures.html


Average [summer/spring/fall] Temps for my grow…

My grow veg room, has a swing from 79 to 63-65 night with AC on…[6am till midnight]

My bud room, high is 85, low is 73-75 f with AC its own, on…[8 pm till 8 am]


I think we always look for a better environment for our plants… Since I have added the new AC unit in veg, I have noticed the night temp swing about 14 degrees… and since keeping plants always below 82 in veg has made plants explode with growth… my temp swing have always been between 10-15 degrees… lights on/off…

IDK, which way is best to grow, I just know what works best for me…

Good Luck!
 
Sand4x105

Sand4x105

Well-Known Member
Some of you guys need to do less posting in cannabis forums and more research about botany.

The rates of photosynthesis and respiration are influenced by many factors, e.g. light, temperature, carbon dioxide, relative humidity, etc. Therefore, temperature cannot be considered in isolation and any statement about an optimum temperature for growth of a given crop cannot be made.

The interaction of factors affecting plant growth is explained based on Blackman’s Principle of Limiting Factors: the rate of a process influenced by many separate factors is limited by the pace of the slowest factor.

In the greenhouse, specific day/ night temperatures are maintained for each flower crop to obtain profitable growth and market quality. Night temperatures have traditionally been stressed in recommendations because plants grow more at night than during the day.

The growth of many plants can occur over a wide range of temperatures. This range may be defined at three basic levels: 1) a minimum temperature below which no growth occurs, 2) an optimum temperature at which the greatest growth occurs, and 3) a maximum temperature above which no growth occurs. Growth rate increases above the minimum temperature until an optimum is reached, then declines until the maximum temperature is reached. The minimum, optimum, and maximum temperatures varies widely among plant species.

Most plants do not respond in the same way to temperature at all stages of growth. Generally, seed germination and early seedling growth occurs most rapidly at warmer temperatures. These same warm temperatures may be detrimental to growth as the plant matures. Young plants have a large leaf area (photosynthetic tissues) compared to stem and root area (respiration tissues). High relative photosynthetic area and warm temperatures favors carbohydrate production and utilization for growth. However, when plants get older, there is more stem and root area (respiration tissues) to leaf area so cooler temperature favor growth by reducing respiration. Plants in a vegetative stage of growth generally have a warmer temperature optimum than those in a reproductive stage. Different parts of the same plant may also have different optimum temperatures for growth. Thus, root growth may show a different response from shoot growth.

http://www.ag.auburn.edu/hort/landsc...mperature.html
Click to expand...
Quoted from Uncle Ben....
 
tusseltussel

tusseltussel

Well-Known Member
you mean uncle ben copy and pasted another article because he has no Idea how to grow Marijuana
Sand4x105 said:
Quoted from Uncle Ben....
Click to expand...
I keep my temps at around 78 lights on and about 78 when lights off and I harvest buds every 9 weeks with no problem
 
justugh

justugh

Well-Known Member
sir

the temps u have are prefect

THC degrades faster at temps above 80 ...................the only reason to even have temps above 80 is for the use of a CO2 enrichment so it has more effect...........unless u are planning to add in one and run it the temps u have are goldie locks zone ( the plants are happy the growth is great and what ever THC is made is not being turned into anything else )
 
chiefrokaho

chiefrokaho

Well-Known Member
Sand, thx for doin my homework for me. I knew i read bout that somewhere. I did read alot of ub stuf before i started. Thx again


Btw, when i read that shit bout flushin, i actualy chuckled out loud. Thx for that
 
chiefrokaho

chiefrokaho

Well-Known Member
legallyflying said:
I will let you in a little secret, google will likely answer your questions better than posting here.

But to answer your question in a smart ass way... why the FUCK do you want at least 15 degree diff? Your post should have said.. I'm pimp as hell now as my diff is less than 10 degrees and everyone knows that a lower temp diff prevents stretching, and stunting do to overly cold evenings.
Click to expand...
No, everyone doesnt know that. At least i havent heard/read that, interestin tho. My night temp is no lower than mid 60s, so not overly cold. I do get ur point tho, last year i woulda killed for these temps.lol
Thx for reply
 
chiefrokaho

chiefrokaho

Well-Known Member
tusseltussel said:
I keep my temps at around 78 lights on and about 78 when lights off and I harvest buds every 9 weeks with no problem
Click to expand...
Have u tried ur grow with at least 10 degree difference to have somethin to compare? Thx, good to know ill be alright hopefully. Wana get to that 'optimum zone'.
 
chiefrokaho

chiefrokaho

Well-Known Member
justugh said:
sir

the temps u have are prefect

THC degrades faster at temps above 80 ...................the only reason to even have temps above 80 is for the use of a CO2 enrichment so it has more effect...........unless u are planning to add in one and run it the temps u have are goldie locks zone ( the plants are happy the growth is great and what ever THC is made is not being turned into anything else )
Click to expand...
No co2 in my near future, jus small, personal use. So if i can keep it in 70s, it doesnt matter if much drop at night? Thx for tryin to get my brain wrapped around.lol
 
justugh

justugh

Well-Known Member
yes infact that can be a great thing some strains gain the hues (blue purple organe) do to the temp change at night

i can name one as berry ryder the blue will not show up unless u can drop the temp down in the high 50s low 60s
 
tusseltussel

tusseltussel

Well-Known Member
true I have noticed some color change in the winter when my room runs a little cooler at night but it didn't effect yield or potency and it was just the leaves so it's not like it would contribute to bag appeal
justugh said:
yes infact that can be a great thing some strains gain the hues (blue purple organe) do to the temp change at night

i can name one as berry ryder the blue will not show up unless u can drop the temp down in the high 50s low 60s
Click to expand...
 
justugh

justugh

Well-Known Member
it is a bio change in the plants pigment in a attempt to retain more heat in the flowers during the off hours

(darker colors aborb more and hold it longer then the lighter ones) ........why in the desert u wear white and in the snow u want black

this is how u really get those pretty buds (no dyes or dry ice tricks ) the real purps
 
chiefrokaho

chiefrokaho

Well-Known Member
Guess im jus worried i wont be able to lower night temps enuff when/if i want. Of course tho, i dont expect to be 'done' til first of november. Be alot easier to have cool nights then. Thx againguys
 
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