I’m growing autoflower and having trouble with fungus gnats, i have added nematodes DE and fly strips to combat but still have a few. I think they’re doing ok. Any suggestions? Do I need to cut back my light at any point? I will probably need help with harvesting for sure?
First successful grow
- Thread starter GaBoy74
- Start date
HydroKid239
Well-Known Member
Looking good. To help kill off the gnat larvae you can mix 3% hydrogen peroxide with water 1:4 and water the soil with it. Be sure to get it down into the root zone.
That.. along with the sticky traps helped me bring their numbers down drastically in my organic pots.
That.. along with the sticky traps helped me bring their numbers down drastically in my organic pots.
HydroKid239
Well-Known Member
Unless the bill is getting out of hand, I’d keep it on 18/6 & maybe even move it to about 12” from the top. [edit: Watching the plants to see how they react. They may want more food with the light closer, or could bleach the top.] In the case you told raise it back up to 18”+
With photos I think chipping away at lights on time may help near the end. I’m just not sure if it matters with autos.