can low temps cause nute lockout?

Titan4jah

Titan4jah

Well-Known Member
ive been haveing a problem with my plants yellowing and showing signs of n def, really purple stems on a none purple strain, you think temps of 60 and lower could have caused some of this, ive also seen what looks to be p def on my space qween??


i dont have ne close up shots this second but you can see some of the yellow on the last shop in my grow log.


thanks n + rep fer help.
 
growers usally go 80-83 f with light no less then 75 f mate for the grow anything under cuz give her stress and stress ain't good my man
 
babyboi420 said:
growers usally go 80-83 f with light no less then 75 f mate for the grow anything under cuz give her stress and stress ain't good my man
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right right im useing co2 so i think i could handle 85, but is n def the first def it would show with cold temps? what happens besides drop leaf?
 
60f wouldn't do it; my flower room gets in the 50's, sometimes mid 40's during the dark cycle with little to know effect. pot really only starts to hurt if it freezes.
 
Titan4jah said:
right right im useing co2 so i think i could handle 85, but is n def the first def it would show with cold temps? what happens besides drop leaf?
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no, first sign would be a darkening of the undersides of the fan leaves, blue/purple/black/red etc. this is showing the p is having a little more of a time getting in and out. it does not stop or hinder flowering, so long as temperatures rise during the light cycle.
 
KP2 said:
60f wouldn't do it; my flower room gets in the 50's, sometimes mid 40's during the dark cycle with little to know effect. pot really only starts to hurt if it freezes.
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really so it must just be not enough n and p then, it would help a low feeding on its way to def though right?
 
KP2 said:
no, first sign would be a darkening of the undersides of the fan leaves, blue/purple/black/red etc. this is showing the p is having a little more of a time getting in and out. it does not stop or hinder flowering, so long as temperatures rise during the light cycle.
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yea i just put them into flower today tho this has been going on, i think its just not enough npk, im useing bmo products. you think a 4 foot plant could be root bound in a 5 gallon pot?
 
yes, but not tremendously; i have plants that go yellow when they're finishing, no matter what you feed them; could be a similar situation.

what are you feeding, and how much?
 
Titan4jah said:
yea i just put them into flower today tho this has been going on, i think its just not enough npk, im useing bmo products. you think a 4 foot plant could be root bound in a 5 gallon pot?
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no, not rootbound, but you might have dry pockets which are worse. do you soak when watering? or do you water from the top? bottom soaking works well, and allows you to feed/water less frequently...
 
KP2 said:
no, not rootbound, but you might have dry pockets which are worse. do you soak when watering? or do you water from the top? bottom soaking works well, and allows you to feed/water less frequently...
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whooa dry pockets? i water from the top...... i
 
Titan4jah said:
whooa dry pockets? i water from the top...... i
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you know how soil dries and pulls from the sides of the pots? then you water and water runs out really fast? this isn't saturating your root mass, but merely running down the sides and creating a dry center. to thoroughly saturate a root ball, soak from the bottom up. i dunk mine in a big bucket, til the pot sinks. then i pull out and drain. it's normal to see slight overwater signs, but this is nothing to worry about, and levels out in a day or less usually.

wicking helps too; keep a pan under the plants, and fill it with water; the soil will wick it up like a sponge.
 
i wonder if a soil ph of 7 would cause what looks like n def, can u use lemon juice to lower the ph of soil? how much per gallon
 
Titan4jah said:
i wonder if a soil ph of 7 would cause what looks like n def, can u use lemon juice to lower the ph of soil? how much per gallon
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7 is perfect for dirt, so no lemon juice, and don't use lemon juice anyway; it only lasts for a few hours... :p
 
KP2 said:
7 is perfect for dirt, so no lemon juice, and don't use lemon juice anyway; it only lasts for a few hours... :p
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actually, i use lemon juice for every watering, and have had no problems with it. It seems to work great. I add about 1/4 tsp. to a gallon, check and add if needed. But only gradually as to not drop it too low. Hope that helps!
 
lilmafia513 said:
actually, i use lemon juice for every watering, and have had no problems with it. It seems to work great. I add about 1/4 tsp. to a gallon, check and add if needed. But only gradually as to not drop it too low. Hope that helps!
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it still loses it's ability to lower ph very quickly :p.

and why? i've had bad soild before, but i've never deliberately adjusted the ph of nute water for dirt. dirt buffers anyway (this is why most soil starts out around 5.5-6.5 ph, peat is acidic, and buffers nutes to low ph). i find miracle gro is good to raise the ph, hydro nutes are good for lowering it.
 
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