Is this heat stress?

T

THC123

Active member

Veteran

• Apr 7, 2012

• #1

so i bought a new extraction fan for my small homebox , the capacity is 400 kubic meters per hour

Max temp in top bud was 24.9 degrees celsius , so i dont think that is too hot right? Outdoors it often gets a lot hotter


Still i think they have heat stress? i dont get why

the lamp is at 55 cm distance and it is 600 watts


Can anyone enlighten me? i suck at indoor growing

 

Guest02345

Member

• Apr 7, 2012

• #2

you dont suck bro....your plants look nice and green...leagues above sucking actually. could be temps. from your pics it looks like this prob is only on the tops? if so i would say heat damage.

 

S

SeaMaiden

• Apr 7, 2012

• #3

If the curling were the opposite, downward and inward, I would call it heat stress. Best I can suggest at this time is vapor pressure deficit. At a temperature close to 25C, relative humidity should be in the 60%-65% range.

I'm not sure this is to do with VPD, though.

 

D

driska

Member

• Apr 7, 2012

• #4

looks like heat stress

 

dread

Active member

Veteran

• Apr 8, 2012

• #5

hmmmm, no idea broski
did you gave extra nutes?

 

chak-ra

Well-known member

Veteran

• Apr 9, 2012

• #6

Pretty common I should say with sativas. But little vapor probs non the less... perhaps in combo with heat stress..

hm... maybe airflow is on the high side.
Could be that the plant transpires to much because of the combo of heat with to much airflow...

Though it looks like you shouldn't worry that much. Thick buds you will yield. Maybe one fan less and raise the lights by 10 cm or so.

Green greetz