Hi,
I have had over 15 successful grows with 0 problems. Now my last 2 grows have been suffering from unknown issues. The only change has been a new grow space within same building but with same conditions (temp etc). some room stats:
3 x nirvanna lithiun og kush in soil scrog
1.5m x 1.5m
1x600W + 1x400W hps
cool tubes with own fan (pulling air in from out and blowing air out of the room)
carbon filter with own fan blowing out of room
GHF 3 part formula @ 1/2 recommended strength
Day temp 26C Night 20-22C and humidity @ 30-40% (day and night)
no light leaks
PH is good.
both last 2 grows beginning of grow has been good all the way till week 4 of flower. Then larger leaves start to get yellow/brown spots in middle of leaves, edges and tips become dry and brittle, grow become slow and almost stops. Last grow i tried to flush but no help. now i have the same starting again. attached is a pic of the leaf from one of the plants.
can anyone help me with this issue?
I have had over 15 successful grows with 0 problems. Now my last 2 grows have been suffering from unknown issues. The only change has been a new grow space within same building but with same conditions (temp etc). some room stats:
3 x nirvanna lithiun og kush in soil scrog
1.5m x 1.5m
1x600W + 1x400W hps
cool tubes with own fan (pulling air in from out and blowing air out of the room)
carbon filter with own fan blowing out of room
GHF 3 part formula @ 1/2 recommended strength
Day temp 26C Night 20-22C and humidity @ 30-40% (day and night)
no light leaks
PH is good.
both last 2 grows beginning of grow has been good all the way till week 4 of flower. Then larger leaves start to get yellow/brown spots in middle of leaves, edges and tips become dry and brittle, grow become slow and almost stops. Last grow i tried to flush but no help. now i have the same starting again. attached is a pic of the leaf from one of the plants.
can anyone help me with this issue?