Lenin1917
Well-Known Member
I foliar feed the first couple weeks, but I stop when the stretch does and the buds really start. I also manage lights on without issue.
What to do if you have light stress in week 5 of bloom?
- Thread starter Adi1989
- Start date
Killaki
Well-Known Member
They look like different things are going on for each plant. The one looks underfed and the one looks more like it was over watered at least at some point.
What's your grow details? Feed, rh, temps, medium, watering habits?
Drug Dealer #1
Member
Right. The VPD is probably off. Looks like OP might not pay attention to VWC either.
edit: also I’d avoid any foliar that late into flower.
Richard Drysift
Well-Known Member
No idea what the problem is but it’s likely not from lighting. How long has this plant been in the same container?
Markshomegrown
Well-Known Member
This was a screen shot of a website, I did not crop the picture and you circled a missed call
Markshomegrown
Well-Known Member
comparing LEDs to the sun, even the time of day in a flower room can be different, the intake air would be warmer mid-day vs first thing in the morning (there could be 5-10c if you pulling air in from outside if you growing in a shed)
Ever grown in a loft, summer vs winter, there is a massive difference.
Flower the plants at night vs day, again flowering the plants at night can reduce the temps.
But I am talking about normal home growers that do not spend loads of money on AC or heaters.
HydroKid239
Well-Known Member
3 pages and still no light stress lol
twentyeight.threefive
Well-Known Member
Yes comparing an LED light to the sun. You literally said an LED light can be stronger than the sun depending on what time it is...
It doesn't matter what time of day it is in a tent for an LED, it isn't as powerful as full sunlight.
Horselover fat
Well-Known Member
Some of the usual suspects seem heavily stressed.
Never seen a plant get burned when the sun comes out after a rainfall. Just a logical thought.
Some people just believe what they are told.
literally had a argument with a old guy that’s “grow” his whole life. Telling me that you have to hang them upside down so the thc runs to the buds. I laughed at first because I thought he was trying to be funny. But he got a little
Pissy.
Thought I was chatting with calvin.m16 in real
Life for a bit.
So wrong but thinks he’s so right.
Some people just believe what they are told.
literally had a argument with a old guy that’s “grow” his whole life. Telling me that you have to hang them upside down so the thc runs to the buds. I laughed at first because I thought he was trying to be funny. But he got a little
Pissy.
Thought I was chatting with calvin.m16 in real
Life for a bit.
So wrong but thinks he’s so right.
hillbill
Well-Known Member
I burned some spraying under a 250w HPS long ago, lesson learned.
Light stress under LEDs can look like a lot of things but browning or yellowing of mid leaves is pretty comsistanat as is upward turned leaves and green veins on affected leaves. Someone noted “praying” plants may be the first warning. Just brought a couple plants through that. Damage though was done and the plants never really fully recovered. Growth slowed or almost paused.
I have never had trouble with droplets on leaves under any type of LED light.
Light stress under LEDs can look like a lot of things but browning or yellowing of mid leaves is pretty comsistanat as is upward turned leaves and green veins on affected leaves. Someone noted “praying” plants may be the first warning. Just brought a couple plants through that. Damage though was done and the plants never really fully recovered. Growth slowed or almost paused.
I have never had trouble with droplets on leaves under any type of LED light.
70's natureboy
Well-Known Member
Everybody agreed that it isn't light stress and they are pale and need more feed.
Tangerine_
Well-Known Member
It appears to be more than one single issue. First and foremost, something off in the rootzone causing an interruption in nute assimilation which then causes the leaves to twist and shy away from the light.
Its rarely ever just one 'thing' but an accumulation of issues. Most have already been pointed out.
OP, the kelp foliar may help a little but its just a bandaid and doesnt address the primary issues.
Its rarely ever just one 'thing' but an accumulation of issues. Most have already been pointed out.
OP, the kelp foliar may help a little but its just a bandaid and doesnt address the primary issues.
Adi1989
Active Member
Thanks mate, what would you recommend to do, I dont want to flush just yet as I find the leaves droop due to lack of oxygen, I find its best to let the medium fully dry out, it could be nutrient lockout even. Ive learnt my lesson for using too big pots for the size of the plants
Adi1989
Active Member
Ive been feeding 1000ppm and the same nutrient as always so I wouldnt say more feed. But it could be too much feed?
Adi1989
Active Member
I would say about a month and a half
Adi1989
Active Member
Is 55% and 27c ok for this stage of bloom,
I thought this would be the safest bet as if the temps swing its in the VPD zone looking at dimlux chart, what temps/RH do you do?
Drug Dealer #1
Member
That was week 5? Week 5-7 I do 75* 55% day
night 68* 45%
Day 1.33
Night 1.28
night 68* 45%
Day 1.33
Night 1.28
Richard Drysift
Well-Known Member
Sounds about right for a plant 5+ weeks into bloom… it’s surely not a deficiency at 1k ppms and that’s super high so my diagnosis is possible salt buildup. Try giving straight water for a week; don’t flush just water as needed with nothing else added. Your soil is likely completely sterile at this point so you’ll probably need to ph adjust to the proper range for absorption.
Adi1989
Active Member
You were right it was salt build up, I found out yesterday they needed a drink, I kept feeding 1000ppm until the runoff hit 1100/1200ppm
I found out before I saw your post, do you think it would have been better to give straight water?
i did feed each pot about 10 gallons / 50L maybe a bit more for some of them where the ppmrunoff was high, I kept the feed to 1000ppmthough
