So it looks like all the new growth is a light green the bottom half is still pretty normal it’s just the top half the only things I can think of cal mag or nitrogen deficiency I gave them a feed last night water ph is 6.35 temps are 70-76 my light is a SF 7000e and it’s at about 75% and approx 24in away they verged on a wayyy weaker light for about 1 1/2 months I think a Mara hydro ts100 maybe that too idk
Light green leaves
- Thread starter Kompi
- Start date
Kassiopeija
Well-Known Member
Nitrogen Mag is mobile and will start at the bottom, though u need to check pH always and foremost as this may be the root of the problem
otherwise feed higher or use urea as foliar that will green them up darker quickly
otherwise feed higher or use urea as foliar that will green them up darker quickly
hotrodharley
Well-Known Member
Your temperature is way too low. Should be at or above 82.
Yea I spayed them for that as well
General hydroponics and it’s ocean forest
I’ve always ran those temps never really been a problem
hotrodharley
Well-Known Member
So what is the problem?
chuckeye
Well-Known Member
Same rate of feed ?
Do you have a ppm meter ? Hard to judge how much food is left in your medium but a reading could be helpful..
Cheers
OldMedUser
Well-Known Member
How fast are your plants growing atm? What most of that looks like to me is they are growing fast and the newer growth takes some time to 'green up' from exposure to the light. Check the height a couple days apart of the same top and I'd wager it's an inch a day.
If they're running low on food you're going to see yellowing in the older fan leaves first as mobile nutes get relocated to the growing tops.
Slim possibility there's some light bleaching happening but you'd usually see leaf margins curling up some before the bleaching.
If they're running low on food you're going to see yellowing in the older fan leaves first as mobile nutes get relocated to the growing tops.
Slim possibility there's some light bleaching happening but you'd usually see leaf margins curling up some before the bleaching.
OldMedUser
Well-Known Member
Hollatchaboy
Well-Known Member
If it's under led light, you want 80 - 82°f.
I would say they are growing at a decent rate, but makes sense because the lower canopy is still pretty green darkerHow fast are your plants growing atm? What most of that looks like to me is they are growing fast and the newer growth takes some time to 'green up' from exposure to the light. Check the height a couple days apart of the same top and I'd wager it's an inch a day.
If they're running low on food you're going to see yellowing in the older fan leaves first as mobile nutes get relocated to the growing tops.
Slim possibility there's some light bleaching happening but you'd usually see leaf margins curling up some before the bleaching.
Yea always the same I do I should probably check the run off haven’t done that yet
I also did think about raising the light even more to see if that would help as it is set to 80%How fast are your plants growing atm? What most of that looks like to me is they are growing fast and the newer growth takes some time to 'green up' from exposure to the light. Check the height a couple days apart of the same top and I'd wager it's an inch a day.
If they're running low on food you're going to see yellowing in the older fan leaves first as mobile nutes get relocated to the growing tops.
Slim possibility there's some light bleaching happening but you'd usually see leaf margins curling up some before the bleaching.
Rurumo
Well-Known Member
Just curious, you said you vegged them under a weaker light-how long have they been under this new light? Also, you are getting some solid advice about temperatures. I think you have some other issues going on besides just low temps, but raising temps to at least 80 will help your plants immensely.
OldMedUser
Well-Known Member
If that is true then it's another reason for me to stick with my HID lights or my heater would be running all the time to keep the temp up. With the 600w SHPS I'm using now it's staying between 73 - 77. My heater kicks in at 72 after lights out. Temp in the basement where the grow room is is just over 50 these days as we stumble toward spring.
Kassiopeija
Well-Known Member
yeah dat true and then these LED put out twice even thrice (vs MH or low W HPS...) amount of photons but then they wont grow more accordingly. only very little more. maybe just 10%If that is true then it's another reason for me to stick with my HID lights or my heater would be running all the time to keep the temp up. With the 600w SHPS I'm using now it's staying between 73 - 77. My heater kicks in at 72 after lights out. Temp in the basement where the grow room is is just over 50 these days as we stumble toward spring.
and run full heels over heads into "calmag" deficiency 
because of chilling plants, frozen metabolism, frozen in time
