Vpd / light / heat stress issues

[hakop]

Hey y’all

So I just got my ac fixed
Now got an issue
Lights are Gavita 1700 currently set at 50%

After ac got fixed plants looked good so instead of slowly raise the power I jumped to 80% power
And all my edges started curling
I know VPD plays a role in this situation
Cuz I’ve ran 100% at this stage before with no leaf edges curling up

My current temps are
81f
76rh
81 leaf temp

I dropped my lights back down to 50% to fix the curl

Question is how can I start giving more light and correct my humidity/ temp so I do t get this curl

Thanks

 

[Newty]

What stage/how many weeks are you at?

In Veg, I never go above 50% and that's not until late, most of the time 30%-40% at 18" for me.

When I flip to flower, I keep at that 50% and in the 2nd week I go to 60% and increase gradually until I'm at 100% in the heat of flower and start dimming light again a few weeks before harvest.

 

[hakop]

What stage/how many weeks are you at?

In Veg, I never go above 50% and that's not until late, most of the time 30%-40% at 18" for me.

When I flip to flower, I keep at that 50% and in the 2nd week I go to 60% and increase gradually until I'm at 100% in the heat of flower and start dimming light again a few weeks before harvest.

week 3 of flower
forgot to mention sorry
I try to be at 100% power by the end of week 3
lights are roughly 35" away
i just had ac issues after getting fixed getting these curls when i up the power

 

[hakop]

Bump

 

[Newty]

week 3 of flower
forgot to mention sorry
I try to be at 100% power by the end of week 3
lights are roughly 35" away
i just had ac issues after getting fixed getting these curls when i up the power

How long was the A/C down for and what kind of temps did you see?

Maybe they were under heat stress and still recovering and the extra light is just a little to much for them right now.

What are you growing in?
Water source?
Nutrients?
How much water are they taking?

 

[hakop]

How long was the A/C down for and what kind of temps did you see?

Maybe they were under heat stress and still recovering and the extra light is just a little to much for them right now.

What are you growing in?
Water source?
Nutrients?
How much water are they taking?

Ac was down for a week
Max would reach 87

Growing in coco
Ro water

Si
House and garden a+b
Calmag
Liquid karma
Big bud
Water them with 2500-3500ml of nutrient water

 

[GNick55]

leaf edge curl is light stress

 

[GNick55]

Hey y’all

So I just got my ac fixed
Now got an issue
Lights are Gavita 1700 currently set at 50%

After ac got fixed plants looked good so instead of slowly raise the power I jumped to 80% power
And all my edges started curling
I know VPD plays a role in this situation
Cuz I’ve ran 100% at this stage before with no leaf edges curling up

My current temps are
81f
76rh
81 leaf temp

I dropped my lights back down to 50% to fix the curl

Question is how can I start giving more light and correct my humidity/ temp so I do t get this curl

Thanks
View attachment 2134094View attachment 2134095View attachment 2134096

Hey y’all

So I just got my ac fixed
Now got an issue
Lights are Gavita 1700 currently set at 50%

After ac got fixed plants looked good so instead of slowly raise the power I jumped to 80% power
And all my edges started curling
I know VPD plays a role in this situation
Cuz I’ve ran 100% at this stage before with no leaf edges curling up

My current temps are
81f
76rh
81 leaf temp

I dropped my lights back down to 50% to fix the curl

Question is how can I start giving more light and correct my humidity/ temp so I do t get this curl

Thanks
View attachment 2134094View attachment 2134095View attachment 2134096

try lowering humidity to 55,. you might after that have to increase feed amount,. have to just watch and see,. if not keep lights up,..

 

[hakop]

try lowering humidity to 55,. you might after that have to increase feed amount,. have to just watch and see,. if not keep lights up,..

Lights are up to the ceilings roughly 35” away from the tallest plants

I’m usually at around 900ppfd at this stage
Currently it’s at 550ppfd

What if I make the room cooler ? Since I can’t really raise the lights up anymore