Pythium.
I believe i may be suffering this right now. I tend to overwater my seeds. Once i get them into 1 gal pots i have usually done alright. But this time... things started out well and now things are really slow in the 1 gal pots. I though they might be root bound so potted up. The roots looked good and white and they were a bit root bound so inexpected them to take off i the new pots, but....so far.... no.
So...what other signs should i look for about pythium?
And...im in soilless...dont do organic...so was thinking h2o2...but i dont know what mix ratio and such...
Hopin you can help me out?
Hey thanks for popping by. This was the first time I've had to deal with it indoor.
In my case I started to notice, almost simultaneously, two main things that alerted me to it.
#1 In late flower, like the last 2 weeks, I noticed my plants were drying out like to a crispy leaf stage, more noticeable at the bottom of the plant. The next batch (4 weeks behind the one I noticed it in) was worse and started this dry/crispy leaf thing within 2 weeks of flower. Towards the end I pulled one at least one week early and it yielded ~30% of what it should have - bad shit.
#2 Around the same time that I noticed the above in my flowering plants I started noticing a couple of things in veg. At first it just seemed to slow down my clones, one strain in particular was probably growing at about 50% it's normal rate, then it seemed like it just stalled. Then I noticed a couple of other strains where even in early veg, I was seeing some of the bottom section/leaves drying out and eventually a couple of the strains got those dry/crispy leaves. Important to note that whether in veg or flower, the drying/crispy leaves were starting from the bottom-up.
It was obvious to me that this was a root issue, looked wide spread, and wasn't going away so I started researching and came to the conclusion that if anything was going to help, it would be H2O2. Or, a mass culling of all clones and starting again - an option of last resort imo!
H2O2 mix:
You can buy food-grade Hydrogen Peroxide @35% concentration, then cut it down. Apparently (I read this a lot but never followed references) this 35% food grade is much better and stable than the typical 3% solution you can buy at the drug store, and a hell of a lot cheaper since you cut it down and get 11x the original amount when you cut it to 3%. I bought mine online in 1L bottles, then I cut it to 3% by using 11 parts filtered water to 1 part H2O2. e.g. I used a 1.9L juice bottle, put 150 ml of the 3% solution in, then filled the rest with filtered water. It's lasted me a few weeks and haven't even used 1/3 of the cut/3% bottle, plus still have 850ml of the original 35% mixture left, it's very economical.
PPM's and uses:
Flowering: I've used 150 ppm of the 3% H2O2 solution, added to my normal feedings in flowering. I've only put it into my mix when feeding (I usually feed-feed, then water-only in flowering). When I water-only I just do straight-up water. It definitely helped as the current run was affected and it looks like I'll be able to finish the run and get some decent yield out of it. In comparison, the run prior to this with no treatment yielded maybe 30% and had to be pulled a week early.
Clones: I've also now used it for a couple of generations
@150 ppm from clone, when transferring the clones from my cloner, I use 150 ppm H2O2 in my water going into party cups. No ill effects, clones are looking great now..
Veg: Last couple of generations every time I feed them, I add150 ppm of H2O2. I just transplanted some clones from party cups into 1gal pots yesterday, there's new growth visible today already, no transplant shock or any sign of H2O2 causing any issues.
I will continue these methods until I'm sure it's gone and with clones, maybe even through veg, I'll continue using it as a preventative measure.
Hope that helps, good luck!
