What in the world is happening to some fan leaves
- Thread starter cannaluv
- Start date
Justinsbudzzz
Well-Known Member
I'm very familiar with the plant deficiencies, I grow 100 percent veganic and run a supercharged soil, same recipe for YEARS, so I'm fairly certain it's not a deficiency, I was concerned it is a fungus,
That what I though to myke, from what I have read and have been told some fungi cannot be wiped off. Really appreciate your time!
smokebros
Well-Known Member
Typically rust like that is attributed to a calcium deficiency. That doesn't mean you're not providing it, but for some reason the plant isn't uptaking it. Could be due to temp issue, PH issue, without additional information about your grow it's hard to tell why exactly this is occuring.
Here's some.info.
8 x 600w hps all air cooled
4 ton mini split
Supplemented cow
Sealed room.
8 wall mount fans.
Temps 72-78
Humidity 35-50
Co2- 1100-1200
RO water (as I'm on a well that has far to much calcium and causes lockout)
Running bioterra plus
Complete biocanna line with added humid acid
Natures nectar phosphorus during mid flower aswell as some seaweed.
General organics calmag at 10ml/gallon
Soil ph fluctuates between 5.5 and 6.3
All of my other plants, cuttings,(in a separate room) and even about 10 of the gsc in the same.room as photod plant dont have this.
Thanks again!
Thanks everyone, I believe you are suggesting the optimal ph for soil.
Bioterra is a soiless coco based product which requires 5.5 to 6.5 ph for optimal uptake. Really appreciate the suggestion though. Any other ideas ?
Renfro
Well-Known Member
I had the same problem at 6.3. First I went down in pH and it got worse. When I went against my gut and tried 6.5 all the sudden things started growing right. Now I stay between 6.5 and 6.8. I use soiless mix and GH nutes. Never ran coco personally.
Ah I gotcha, so I should as some potassium bicarb to the biocanna to get the ph to the mid to high 6,s. Very strange that this is only happening to the gsc. We have 11 other rooms all running the same way each.containing a different strain and have never run into this in over a decade. Using veganics or properly built.organic soil and teas I've never particularly worried about ph, except for when preparing our aeroxloners.
My main concern was it was a type of rust fungus or septoria.
Really appreciate your time renfro.
Renfro
Well-Known Member
I would suspect the damage wouldnt be limited to just a part of the plant if fungus were the culprit.
honestly you may have just had a bad feed. since the new growth looks good maybe change nothing and keep watching the new growth.
CannaCountry
Well-Known Member
According to the Website, BIOCANNA Bio Terra Plus is a reduced peat potting mix composed of the best white peat, coco coir, and organic bases without any materials derived from animals.
It's not 100% coco...hence Renfro isn't so far off base in his pH idea.
Have you always used this medium? Are you using it across all your grows? It's been my experience a lot of people have issues with the peat / coco hybrid mixes. Peat mixes like one range of pH, Coco likes another and I think, though I don't have any empirical evidence to prove it, that finding the perfect pH range when using these mixes is very difficult for most, and hence they don't provide very good results. Never the less, it is what it is at this point.
Anyhow, my first inclination would lean towards a Ca issue. Have you attempted to impart just Ca (leaving out the Mg) into your feed or as a foliar spray?
Keep in mind you're pushing your plants for optimum results by using the CO2...they are most likely using nutrients at a very high pace for this reason. You may just be shorting them on things they need (Ca) for as hard as you're pushing them.
It's not 100% coco...hence Renfro isn't so far off base in his pH idea.
Have you always used this medium? Are you using it across all your grows? It's been my experience a lot of people have issues with the peat / coco hybrid mixes. Peat mixes like one range of pH, Coco likes another and I think, though I don't have any empirical evidence to prove it, that finding the perfect pH range when using these mixes is very difficult for most, and hence they don't provide very good results. Never the less, it is what it is at this point.
Anyhow, my first inclination would lean towards a Ca issue. Have you attempted to impart just Ca (leaving out the Mg) into your feed or as a foliar spray?
Keep in mind you're pushing your plants for optimum results by using the CO2...they are most likely using nutrients at a very high pace for this reason. You may just be shorting them on things they need (Ca) for as hard as you're pushing them.