What’s up DGC! I could really use some help. I’ve had to runs in a row plagued with the dreaded pm. I trashed a good 25% of my last two harvest’s and washed everything else that didn’t .have any visible signs of pm with a hydrogen peroxide solution seems to be ok. I have a quest dual 105 so no humidity issues 2 hurricane wall fans so good circulation Merv 12 on my air intake and temps stay between 80and 82 in the day and around 73 at night so I’m not really sure why it keeps coming back. I spray Neem in veg which seems to work great never any signs of pm in veg. In flower I use green cleaner or flying skull nuke em usually but the last to runs it just keeps creeping in late in flower. I plan on clearing flower room and using prokure g fast release to sterilize and prokure D slow release after. I was wondering if anyone has experience with these products our advice on how to safely use them. Prokure D says it’s safe for plants and humans because it’s such a low level but still affective against mold but will it degrade smell or quality of bud or kill good bacteria in soil,can I use it dry room or late flower.can I use prokure g in flower room with with veg plants in adjacent room. Seems like an awesome.product but not enough info available on howbto use it in grow situation. Thanks DGC!
833-420-2420
What is the condition of the room? Temps, fans? Have you tried burning sulfer in veg? Have you tried new strains? Is there any plants that Dont get it that are right next to ones that do? If I can be Frank, are you a pig? Have you really done the cleaning nessasary? Inside fans, lights,walls monitors. Duct work? Now, the spores are probably impossible to completely remove… however the more you scrub the better. Really though, you are providing food, shelter,moisture to an unwanted guest. Remove one or more of these things and it will not want to live with you. I had a scare recently after five years of sulfer smelling bliss. I took a look in the mirror. I had changed some things for a dog reasons. I stopped burning sulfur in veg room. That treated the plants in addition to all the surfaces. I was not exhausting the building as much to keep dog warm. I fooled around with my fans. Having different ones turn on at different times instead of the constant tornado I had been hosting. What do you see when you dissect the garden? Some strains get it and some at least Dont show if they do. Look for that in the description.
I dealt with pm for a long time and I went down the same rabbit hole you’re about to. I grew perpetually and always needed a harvest so I never took the time to break down and clean but that’s just what you have to do.
Clean the grow room with a solution of water and hydrogen peroxide
Use HEPA filter, keeping the humidity low and avoiding overcrowding plants
Monitor the plants regularly for signs of powdery mildew
Dispose of infected material properly in sealed plastic bags.
And like Guru used to say, keep the air moving and avoid temperature swings.
Cleaning is a good place to start, but it sounds like there is potentially other stuff that needs to be addressed here too. PM should not be this difficult to get rid of unless you are continuing to create conditions where it can thrive.
environment is huge. You mention you have a dehumidifier but did not mention specific room humidity. Make sure temp and humidity are consistent and not fluctuating. swings in humidity and temp can cause PM to spread. It sounds like your day/night temps vary a bit. I would try to get those much more consistent. Also keep in mind, a big temp drop when the lights turn off will cause humidity spikes and even condensation within the canopy (which is a recipe for PM). Air movement within the canopy can help eliminate unfavorable microclimates, but keeping room humidity consistent and avoiding spikes is super important too.
Genetics is another really big factor. Are you growing the same clones or genetics each run? Are you starting from seed or growing (potentially dirty) clones?
Once a plant has PM, it’s nearly impossible to get rid of it for good. PM spores lodge themselves deep into plant tissues and can remain dormant for a long time. It may seem like you’ve gotten rid of the problem, but the odds are very good it will come back at some point down the line.
Make sure you are starting with fresh clean genetics and not continually reinfecting your space. Try to choose genetics that are not prone to PM issues and make sure you are working with clean plants from a clean source.
It sucks, but when you’ve had PM it’s really best to ditch ALL your plants and start completely fresh.
Another big factor is you and the area outside your grow. Make sure your yard and the areas around your property are clean and free of diseased or unhealthy plants. Clean up dead plants and debris from around the inside and outside of the grow. Remember that YOU can transmit pests and diseases, so make sure you are showering and changing into clean clothes before entering indoor grow areas.
Anyhoo, I hope those tips help. Preventing PM should always start with good habits and a healthy environment. Prokure is a neat tool for keeping your space clean, but it’s not a silver bullet.
Day temps were consistently 81 degrees with Rh 55-60% and I have good air movement 2 t8 ac infinity inline fans and 2 16 inch hurricane fans in a 9×12 area with a lung room with dehumidifier and ac. When the lights shut off there is a swing in temps from 81 to about 73 degrees within an hour. Do you think that could be to large of a swing? Ive grown this strain gg4 for about two years with no problems and close to 6 total years growing overall with no pm and boy do I miss those days 😂. Thanks for all the help
I have a cut of gg4 that I really love and was told it came from subcool I got if from a gentleman I meet at a local hydro store. He told me he would give it to me in honor of subcool and normaly didn’t give cuts away. I honestly was sceptical at first because I live on the east coast and know where near sub. But I gave it a shot and it quickly became my favorite so I don’t really know if it really is from sub or not but it’s my favorite and it’s got a cool back story true or not 😂. But my point is if I had to keep it is it possible to fully remove all pm spore and save it and if so how would I do that? Thanks for the help!
dropping from 81 to 73 when the lights go off is a bit of a swing, but not too bad. My concern would be… how is the humidity effected by this temp drop? When temps drop, humidity will climb. This could potentially cause condensation between the leaves and encourage PM issues.
If you are running the same infected genetics thats a much bigger concern though. Once a plant has PM its pretty dang hard to get rid of it.
You can treat it and make the visible symtpoms go away, but its very likely the PM will pop back up again given enough time and the right conditions.
Ideally I would totally ditch that cut and start completely fresh with new genetics. Get rid of ALL the plants and clean the crap outta the grow area before starting over with some seeds or clean cuts from a trusted source. I understand that kinda sucks, but so does dealing with PM all the time! If PM has embedded itself into the plants you are cloning, its going to keep popping up on new clones.
Theoretically there are ways to “clean up” a diseased cut, but most of them involve complicated stuff like tissue culture or repeated meristem cloning over many generations. Neither of these options really make much sense for a home grower.
If it were me, I would totally cut all the plants down and start 100% fresh with a clean room. PM can be such a pain in the ass, especially when you are dealing with it long term. Better to cut your losses and move on with some fresh stuff that wont be such a hassle.
So much good information here. One other thing to think of is the environment outside of your tent. You don’t want too dry of an area, compared to your grow space. Pm likes dry climates, and then the spores can bloom or germinate like crazy once it hits that humid space in your grow area.
Good point about the dry. This can get confusing I’m sure. This is when they catch a ride and land everywhere in case anyone is wondering why dry came up. If the spores are wet they can fly. I think of it like pollen in that regard.