Top leaves turned yellow

G

grou

Active Member
dutch passion
Think fast
17-21c temperature
Humidity: 38-45%
Light distance: 15-20cm
Flowering week 7
Im using flora trio 0.5/1/1.5 ratio
im using 20 watt bulbs (18 in total)

best guess is light burn, but the problem is that some lower buds have this problem and some taller buds (closest to bulb) dont have this problem

this plant was very dark green so i dont think its genetics

lower leaves are dark green (2-3 started to go yellow due to flowering)

Thank you for your time
 

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Bukvičák

Bukvičák

Well-Known Member
Adjust your light before you start chatching a ghost. If it wont stop or gets worse than it looks like def...
 
Bukvičák

Bukvičák

Well-Known Member
grou said:
dutch passion
Think fast
17-21c temperature
Humidity: 38-45%
Light distance: 15-20cm
Flowering week 7
Im using flora trio 0.5/1/1.5 ratio
im using 20 watt bulbs (18 in total)

best guess is light burn, but the problem is that some lower buds have this problem and some taller buds (closest to bulb) dont have this problem

this plant was very dark green so i dont think its genetics

lower leaves are dark green (2-3 started to go yellow due to flowering)

Thank you for your time
Click to expand...
They look good and it is not definitely bud rot
 
Bukvičák

Bukvičák

Well-Known Member
Also your temp seem to be quite low and temp in root zone is ussually 2-4 degrees lower. Too low temp in rhizosphere means poor nutrient uptake if we talk about soil ofc
 
G

grou

Active Member
Im using water tanks to heat up my tent( 100x100x180)
Stems closest to water tank dont have this problem
 
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