Surfingfarmer
Member
Leaf Septoria (Yellow Leaf Spot) got into my tents. Maybe from working out on the lawn than my indoor garden. It’s everywhere bud still got good buds forming. Any thoughts on how to kill it with out affecting my flowers
Leaf septoria
- Thread starter Surfingfarmer
- Start date
Surfingfarmer
Member
I’ve already narrowed it down to a septoria 100%
I’m running 1/2 dose bio canna, full dose bio boost, and 1/2 dose GUANO 1-9-1 SUPERBLOOM. I cut the bio canna dose in half because it drops the PH of the solution. This mix it have going is PHed to 6.1
each plant dinks about 4 litres of water every other day. I’m growing in organic bark and peat potting mix
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Nizza
Well-Known Member
The reason you would have septoria is because of high humidity, giving it optimal conditions to grow in. I would start by fixing this with more circulation and some defoliation, removing any affected leaves. Is the exhaust fan on all night? I wonder if you are having humidity spikes, try setting up something to monitor the humidity and figure out a way to fix it
I also wonder what a bark/peat based soil mix would be like for PH, is there any lime in the mix? It may be a low pH problem as well
or even a cal-mag deficiency
Surfingfarmer
Member
I have 100mm in line fan. 2 box fans on the floor and 2 clip on at canopy level. Got a commercial dehumidifier in the space. Best I’m able to get is 55-60%.
flowers look sweet but my leafs are dying off fast
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Nizza
Well-Known Member
Identify and Treat Septoria Leaf Spot in Hemp Plants
Weather conditions in the southeast make the hemp plant a perfect target for Septoria. Equip yourself with the right knowledge before it's too late.
canvastsupplyco.com
here is a good read on septoria, the buds look far along so I would just carefully remove whatever you can and do what you can to clean up the grow spot and improve circulation. They mention being able to use a few products in flower but I would avoid it
do you have any pictures of the plants with normal lighting? It is hard to see the true color. They look nice and plump though good work!
Surfingfarmer
Member
Identify and Treat Septoria Leaf Spot in Hemp Plants
Weather conditions in the southeast make the hemp plant a perfect target for Septoria. Equip yourself with the right knowledge before it's too late.
here is a good read on septoria, the buds look far along so I would just carefully remove whatever you can and do what you can to clean up the grow spot and improve circulation. They mention being able to use a few products in flower but I would avoid it
do you have any pictures of the plants with normal lighting? It is hard to see the true color. They look nice and plump though good work!
now after a major deleaf and prune I’m thinking it’s a combination of over watering and nutrient burn from my too much P in my NPK. The guano I’m using is 1-9-1 and I was using a biggish dose without building up to it. So much to learn and understand growing. This is number three and I’m far from dialled in. So now I’ll try to slow down my watering and feed a little less. I’m trying to grow with organic bottled nutrients. I don’t want the soil to dry out because I don’t want my microbes to die but I also guess I need the soil to not be wet at the bottom so my roots don’t sit in water. Last grow I didn’t have any problems but I wasn’t using the guano. Just bio canna and a ton of PH up because the bio canna dropped the HP so much. But it seemed to work better.
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Herb & Suds
Well-Known Member
You were told you didn't have Septoria and you denied that info
Surfingfarmer
Member
I was sure the brown spotting was spore penetrations. But now I’m not so sure. Or from what I’m reading now, it could be a fungus that the plant from being unhealthy after a nutrient/watering problem. I’m also reading the spotting could be a results from a. Clones mother being aged. So yes I discounted what people were saying. But it did look to me I watched a fungal infection spread. But now I’m thinking I was mistaking.
Wizzlebiz
Well-Known Member
Nizza
Well-Known Member
I was originally thinking a deficiency~ perhaps nitrogen but it is hard to tell without plant pics under normal lighting. The LEDS make it hard to see the true color of the leaves.
Also I am unfamiliar with that nutrient line, maybe a basic NPK ratio of each one you are using will help get to the root of the issue. I am guessing here but could it be a nitrogen deficiency? Some growers make the mistake of cutting N all together when it is actually very important for flowering.
also yes the P should be the lowest amount you are feeding in my experience. For a rough rule of thumb i follow a 3-1-2 ratio for veg, and 2-1-3 ratio for flower. Anything around that combined with proper run-off usually works fine
revisiting this, the phosphorus abundancy could be causing lockout of calcium, magnesium, copper, iron and zinc.
also a nitrogen deficiency would cause them to become light green, I would guess this is the problem but it is hard to really tell without more info
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Surfingfarmer
Member
I don’t think it’s nitrogine. My vegging plants are sweet. It only happened when they get switched over to flower. It’s more likely that they were first burned from too much flowering nutrients. Than suffering from over watering.they flick over to flower. Bio canna NPK: 2.2-2-5.5 and my guano is 1-9-1 which seems super hi in Phosphorous. There isn’t good light in my garage I can try and get a natural light pic when the lights come back on
Surfingfarmer
Member
Surfingfarmer
Member
I’ve been reading that these burned tips are most likely from too much Phosphorous
Surfingfarmer
Member
Could it have been a shock switching from vegging to flower nutrients. Going from high nitrogen vegging nutrients to low nitrogen flowering nutrients. Do people mix the two during tradition?
Surfingfarmer
Member
I was right in the beginning. It is 100% brown spot. It’s taken 90% of my fan leafs... but the flowers seem fine. Hopefully it stops with these plants. I want to get it out of the space before I reload the flower room. I had them all crammed in a veg tent before flowering. I think that how I got brown spot. Over crowded veg tent :/