Hi I'm in week 2 of flower. 6 small plants under 400w hps in soil in a basement. 2 Marion Berry, 4 Headband. Plants have been super healthy from the get go but I started seeing powdery mildew spots on one of them about a week ago and misdiagnosed it as spots from big bloom water. Now it's a full
blown PM problem. I'm really concerned because I'm going to start seeing flower formation any day now.
The thing that has me confused is my conditions are not ideal for PM growth at all. Day time temps are 74-78. Night temps 68-70. Humidity 30-40% during the day 35-40 at night. I have a big circulation fan running 24-7 and an oscillator on with the light. Plants are not overly crowded.
Actions being taken:
Carefully cut off affected leaves.
Spraying with Serenade
Bringing night temps up to 70-72
Runing oscillator fan 24-7
I'm also buying a better hydrometer that can be calibrated. I'm suspecting that mine has to be off since it stays roughly roughly the same day and night even though the temps drop.
The questions:
Why the hell do I have PM? Am missing something? I have good circulation, not over crowded, temps and humidity seem good. Are they to crowded? It is in a basement that I suspect had been used as a grow room by previous tenants.
Is there anything else I should do?
And what are my odds of winning this battle? Iv read that PM actually gets in the plant, not just on the surface and will keep growing back. Someone tell me they have handled PM mid grow and secceded!
Thanks for the help
blown PM problem. I'm really concerned because I'm going to start seeing flower formation any day now.
The thing that has me confused is my conditions are not ideal for PM growth at all. Day time temps are 74-78. Night temps 68-70. Humidity 30-40% during the day 35-40 at night. I have a big circulation fan running 24-7 and an oscillator on with the light. Plants are not overly crowded.
Actions being taken:
Carefully cut off affected leaves.
Spraying with Serenade
Bringing night temps up to 70-72
Runing oscillator fan 24-7
I'm also buying a better hydrometer that can be calibrated. I'm suspecting that mine has to be off since it stays roughly roughly the same day and night even though the temps drop.
The questions:
Why the hell do I have PM? Am missing something? I have good circulation, not over crowded, temps and humidity seem good. Are they to crowded? It is in a basement that I suspect had been used as a grow room by previous tenants.
Is there anything else I should do?
And what are my odds of winning this battle? Iv read that PM actually gets in the plant, not just on the surface and will keep growing back. Someone tell me they have handled PM mid grow and secceded!
Thanks for the help
Attachments
-
1.1 MB Views: 23
-
798.5 KB Views: 20
-
2.1 MB Views: 16
-
2.1 MB Views: 20