cant get off 20c

cobshopgrow said:

dont go mad if its below 27C.
i prefer above 25C myself but they never do bad as long its clearly above 20 (i seldon to never have a temp below that during day, cant say therefore).

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ive just noticed due to my intense leds, that when i go below 27 or 25 at max, that my lights need to be dimmed right down as i get purpling tops and dry ripple looking leafes from the stress off the lights intensity,
apparently this is the case due to the slowed metabolisum not beign able to process calcium and magnesium not beign metabolised fast enough to deal with the lights,
VPD is the critical component here where the humidity doesnt fall in to the relative space for proper transperiation leading to deficiencys and desease,
with the leaf surface temp reduced underled it seems the important factor is the temp and humidity, as when temps are below 27c with led the plants is now in the sweet zone, they prefere it hotter than hps and atm im colder but i cant increase my Dimmers from 40% without stressing them though it raises temps it doesnt raise them enough to deal with the intensity, i feel the heat needs to be more than what the leds can deliver to make the ramp up of the leds efficent,

like if i used the oil rad to rasie the temps beyond whta the led is cabable of delivering it would widen the gap by increasing the cal and mg metabolisium and allowing for more intensity of light


i am an organic grower so i dont really like adding sprays and things of ca mg especialy when there already there just not being used efficently so adding more would over do the soil and plants with unneeded camg to casue problems again later on lol

interesting article showing relations similar with effects of heat also
i know not directly linked to cannabis but thaught someone might like to see
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1056544/pdf/plntphys00614-0161.pdf

sure nutrient uptake is better above 25c when they transpire more.
you should be still able to dial it in.
even if the temp is above 25c they dont take magically twice the light.
this below is also organically growen, plants never sawn 25c, mostly about 23c over the day.
i havent fed them any salts either, btw, you can safely use epsom salt in organic if you feel you need it.

light intensity is the biggest factor, above seeing a good 200w on a square meter plus some watts from the buddies.

they got a bit too tall, will see how long the tops can stand the intensity.
i prefer my lights a little further away but cant go higher anymore.


edit: with i havent fed salts i ment i havent fed classic mineral salt fertilizer.
i sprayed some epsom in veg and transistion, my organic fert pellets will contain epsom salt too and the soil mix was prefertilized (but not that strong).
am quite sure they run on worm casting mostly right now.

Wow, what a meter!

cobshopgrow said:

sure nutrient uptake is better above 25c when they transpire more.
you should be still able to dial it in.
even if the temp is above 25c they dont take magically twice the light.
this below is also organically growen, plants never sawn 25c, mostly about 23c over the day.
i havent fed them any salts either, btw, you can safely use epsom salt in organic if you feel you need it.
View attachment 5056924
light intensity is the biggest factor, above seeing a good 200w on a square meter plus some watts from the buddies.
View attachment 5056925
they got a bit too tall, will see how long the tops can stand the intensity.
i prefer my lights a little further away but cant go higher anymore.
View attachment 5056926

edit: with i havent fed salts i ment i havent fed classic mineral salt fertilizer.
i sprayed some epsom in veg and transistion, my organic fert pellets will contain epsom salt too and the soil mix was prefertilized (but not that strong).
am quite sure they run on worm casting mostly right now.

Click to expand...

dang ye it just seems coinidental that when my temps are 26 i can get 80% outa my hlgs, but when im 20c if i try over 50% they go purple and curl up lol.

that stops when i raise the temps,
so if i am able to uptake more nutrients then the cal and mg help deal with the intensitys of lights so kinda in away does , but more in the way of the intensity makes the demand for ca mg more,
when i was running salt ferts on led we was always advised and found it better to add 1g epsom to the mix and that avoided the yellowing fade early flower and other problems from the intensity,

i swapped to full coots organics notill i am on till 5 now, gettin better n better ,
i have noticed that my 3500 bxeb lights dont yellow asmuch as my other led,
i found that the bud was smaller too, but then realised my 480 wat is stread now over 4x2ft, so the whole plants bigger.
my old led is 420wats in 1x1 and the plant is concentrated under that 1 light only rest is puny ,
gettin the other bxeb up now as i was doing comparison, bxeb wins lol just thinking as my HLG room seems more intense on the light also there alot smaller so i can see why they need more head height, but i cant get em up past 50% there 350r x 3 at 50% id like to get em up to 70 atleast lol but thye dont heat anythign less 100% power dimmed there so cool lol

that pffd on a bxeb pannel? askin as at 2grand im never getting that meter hahah fuuuk me, im bxeb on hgl 480 driver 14 strips .800ish amp i believe

in the end what do i know, my temps are also more like 23 not 20.
there is a relation for sure, as you describe, but i still think one can make even lower temps work, see moflows grow there, hes below 20.
maybe your mix lacking a bit Mg? honestly, no problem using epsom salt in your coots mix, its "organic" even beeing a salt.
am prob simply lucky with the mix this time as no Mg problems this run.
intensity can be really tricky to dial in, i have no real overview what youre having there.
recently there are cheaper meters avaiable, maybe that would be a option?
or maybe the photone app will work on your phone idk.