Sick plants moved from indoors to outdoors. After hardening off they recover. Why?

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houdini1

Member
Indoors : Temps. of 25 deg. C., good air circulation, room well ventilated with fresh air, 1000w HPS. Young plants, 3rd. set of leaves, in good virgin Atami soil, watered with only ph adjusted water. Plants are chlorotic, stunted growth, poor root development.

Moved one plant outdoors as a test. After two weeks hardening off, plant came to life and grew completely normally. Plant in the same pot, soil unchanged. So the ONLY differences are air, light, temps. and water because I'm using a different water supply.

What is the problem indoors, anybody ?
 
Buddingbishop

Buddingbishop

Well-Known Member
houdini1 said:
3 x honeywell air circulating fans; 1 x 720m3/hr. inlet fan.
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Your guess would be as good as mine as to why it liked outside much better. The suns spectrum/intensity is what might have made the difference, how far away is your light? The only other thing that i can think of is the plant thought it was time to flower and the growth then exploded
 
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houdini1

Member
Buddingbishop said:
Your guess would be as good as mine as to why it liked outside much better. The suns spectrum/intensity is what might have made the difference, how far away is your light? The only other thing that i can think of is the plant thought it was time to flower and the growth then exploded
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The light was about 2 feet from the plants. Thinking that that may have been a problem I backed it off to 4 feet. No improvement after 2 weeks.
 
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houdini1

Member
mouse said:
I still reckon your co2 is too high for the little plants.

Mouse
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Hey mouse. You really think 900-1000ppm CO2 is too high for young plants ? Then I'm up shit creek as that's the ppm of the fresh air where I am (or my co2 meter is on the blink).:cry: But think about it....the co2 ppm in your house is probably 1000ppm....
 
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mouse

Well-Known Member
I dont know about the distance from light too much I always go as close as humanly possible but I have never worked with 1000 watters before only 600's.

Mouse
 
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houdini1

Member
Thanks buddingbishop for that chart. As you can see 24" is not a problem (where the light was originally) and 48", where I backed off the light to, is not even on the chart !
 
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mouse

Well-Known Member
probably not then. but if thats ambient then I would knock the gennie on the head just to eliminate it from the mission. But to be honest I am talking out of my arse when I speak about co2 as I have never personally used it ;)

Mouse
 
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mouse

Well-Known Member
Will the co2 sink to the floor ? small plants co2 on the floor ?

God knows but I really want to know what it is !

Mouse
 
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mouse

Well-Known Member
Right we can eliminate lights then. just to double check whats your temp and humidity ? and do they rise majorly over night ?

Its not soil we know this. If your temp and humidity are ok then it could be airflow.

You have loads of air circulation.

Whats left ?

Mouse
 
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houdini1

Member
mouse said:
probably not then. but if thats ambient then I would knock the gennie on the head just to eliminate it from the mission. But to be honest I am talking out of my arse when I speak about co2 as I have never personally used it ;)

Mouse
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I've used co2 for a long time. For a room full of say 2 foot healthy vegging plants, they gobble up co2 in no time. If you were to shut off your fresh air supply to such a room (assuming you have no co2 supplementation), the co2 would be used up in a matter of hours.
 
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houdini1

Member
mouse said:
Right we can eliminate lights then. just to double check whats your temp and humidity ? and do they rise majorly over night ?

Its not soil we know this. If your temp and humidity are ok then it could be airflow.

You have loads of air circulation.

Whats left ?

Mouse
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Temps are 25 deg. C, humidity an average of 50%. Temps drop overnight on an 18/6 cycle but not much. Temps are controlled by A/C.

Well mouse, whats left is the water. I'm importing water from a source I KNOW to be good and am now feeding this completely unadjusted to my young 'uns. Its pH is 7.5, not perfect I know but not going to cause any big problem either.
 
Buddingbishop

Buddingbishop

Well-Known Member
houdini1 said:
Thanks buddingbishop for that chart. As you can see 24" is not a problem (where the light was originally) and 48", where I backed off the light to, is not even on the chart !
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No problem, i would move the lights closer and see how the plants respond
 
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