plants look decent at lights on and half of the cycle and crappy before lights out

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bigmikeyg

bigmikeyg

ok so i have two tents..

one is a 5x5 with a qb led growing in promix and worm castings in 7 gallon pots..

second tent is a 2x4 with a mars hydro tsl2000 and it’s rdwc..

running green planet nutrients with ro water .


here is a picture of what they look like just before lights out today(7am) the plants looked decent 8 hours earlier.. they seem to be still a bit droopy at lights on (1 pm) and then get better and last night at 9pm they looked decent ..
been running just ro water and some cal mag additives las two watering in the promix when i did run off the ph was 7 and ppm was 600ish
then just before lights out TRASH.. been watering with the water at a 5.8 ph for the las two cycles

i use a humidity controller 50-55
temps in tents are under 30
hydro res under 20.. house is set to 19 during day and 18.5 at night these are in basement.. never had this issue before with last grows this seems weird as all get out ..
have outdoor plants running same nutrients and they are fine ..

any thoughts or questions ? please help :)
 
Aqua Man

Aqua Man

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I'm thinking light intensity and to much wind.

How high is that fan set and how close are the lights?

If you have an android you can download light meter by my mobile tools and give a lux reading.

Also how much air exchange do you have going on here? Have something else in mind possibly.
 
bigmikeyg

bigmikeyg

fan is on low and runs 24 7
par meter has around 650-700 at middle last time i checked and then i raised it up

and i have 6 inch fan and carbon filter running about half speed..



I'm thinking light intensity and to much wind.

How high is that fan set and how close are the lights?

If you have an android you can download light meter by my mobile tools and give a lux reading.

Also how much air exchange do you have going on here? Have something else in mind possibly.
 
bigmikeyg

bigmikeyg

fan is on low and runs 24 7
par meter has around 650-700 at middle last time i checked and then i raised it up

and i have 6 inch fan and carbon filter running about half speed..
and i have 4 inch fan and carbon filter full tilt on the 2x4
 
bigmikeyg

bigmikeyg

fan is on low and runs 24 7
par meter has around 650-700 at middle last time i checked and then i raised it up

and i have 6 inch fan and carbon filter running about half speed..



I'm thinking light intensity and to much wind.

How high is that fan set and how close are the lights?

If you have an android you can download light meter by my mobile tools and give a lux reading.

Also how much air exchange do you have going on here? Have something else in mind possibly.
Ok and what is your light cycle? 18/6?
yessir ..
Ok and what is your light cycle? 18/6?
yessir

and here is pics at 4 hours into lights on today .. those crappy photos were from this morning 20 minutes before lights out

no watering in the soil and nothing to res .. gonna add some ro today as there has been some evaporation with my swamp cooler so just to bring the ppm down a bit
 
Aqua Man

Aqua Man

Staff member
Supporter
It's not abnormal to see plants droop a bit before light out. They get used to a light cycle and will often look like they are getting ready for bed.

Looking at the info I think they are just being driven a bit hard for thier age, conditions and light cycle. I would back the light off a bit more and increase the humidity.

A par of 300-400 should be good with an 18hr light cycle. Where we need to increase this to your 700-800ish is in flower. This is because we have less time to deliver the light.

Plants have a light saturation point and this is largely affected by CO2 levels. Without CO2 supplementation on an 18hr light cycle 300-400 should be plenty.
 
bigmikeyg

bigmikeyg

It's not abnormal to see plants droop a bit before light out. They get used to a light cycle and will often look like they are getting ready for bed.

Looking at the info I think they are just being driven a bit hard for thier age, conditions and light cycle. I would back the light off a bit more and increase the humidity.

A par of 300-400 should be good with an 18hr light cycle. Where we need to increase this to your 700-800ish is in flower. This is because we have less time to deliver the light.

Plants have a light saturation point and this is largely affected by CO2 levels. Without CO2 supplementation on an 18hr light cycle 300-400 should be plenty.
ok .. i’ll back off light for sure .. charging up the par meter now .. used to run last batch at this level no issue and no droop :) the clones in the small tent are young but the others are months old from seed been mainlining
 
Aqua Man

Aqua Man

Staff member
Supporter
ok .. i’ll back off light for sure .. charging up the par meter now .. used to run last batch at this level no issue and no droop :) the clones in the small tent are young but the others are months old from seed been mainlining
Could be more light sensitive strains. I just ran into that myself. Make sure there is not constant airflow on them or it can lead to windburn. Instead of tossing a Rh number at ya I will link you a thread on VPD. In high light grows it makes a big difference especially in hydro.

 
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