SMACKA
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Didnt you say you were in soil? Those ph numbers look like hydro numbers. I don't think you want to go below 6.5 in soil.
As you can see according to this chart at those numbers you would be getting very little if any cal mag. And those do look like cal mag issues imo. Hopefully someone else will chime in as I'm in Coco not soil.
Ok got ya. Ya that's why I asked if soil and also hoped others would chime in. What is the brand? Can you put a pic of the label or something? We can figure this thing out and salvage you a harvestAppreciate you weighing in - I've wondered about whether I should increase pH towards 6.5 on a bunch of occasions.
I originally thought I was in a mainly- coir/inert medium, but @Mr Bee corrected me, here: https://www.thcfarmer.com/community...tory-of-micro-cultivation.88654/#post-1912151 and sure enough when I check the bag, it says mainly peat moss.
The nute bottle says 5.8–6.2 for recommended pH, and the bag said the soil is pH'd with a buffer to around 5.8–6.3
Any help is appreciated.
What is the brand? Can you put a pic of the label or something?
The lower leaves that are a pale yellow suggest N issue and the upper leaves with rust spots suggest Ca. N is a mobile nutrient and Ca is an immobile nutrient. Mobile nutrient can show in lower growth while immobile will be in the new growth.
There is obviously more than one thing going on but I'm confident it can all lead back to one thing causing a chain reaction. PH is usually a good way of bringing lockouts of nutrients which will show as a deficiency. Even if you are feeding it a certain nutrient it might not be recieving it.
It's hard to say and I'm trying to discern it with you. It will help me grow as a grower. Lol
Do you happen to know your EC/ppm going in and runoff?
Ph of 6 is for coco.between 5.8 & 6 is where I ph my coco but in soil 6.5.i grew in soil for 12 years non stop.im sure your plants would still grow with a ph o 6 but it's not what I would do that's all I'm saying.its up to you what you do of course1) Is it possible the nutrients are too low, and that dropping 4mL/L to 1.5mL/L drop was too much, and since the pH is fine they're showing various nute deficiencies?
If not...
2) @Mr Bee has grown in Canna Terra Pro+ before and mentioned pH'ing to between 6.5–7.0, which is tempting to follow, even though everyone else is saying to go lower. Wondering if "pH to 6" has been an incorrect mantra, and that the pH issues we're seeing are because pH is 0.5 too low.
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The hunch of nutrient deficiency came from the fact the bag recommends 5.8–6.2 pH and that's where I've been feeding for 10 days with no noticeable change.
The hunch of pH being too low came from the fact that I've dialed nutes back, and there's still a bunch of funky blotches, purpling, lime green leaves, and skinny leaves.
Essentially you do have close to 6 .3 - 6.5 pH. Think about it, if it is 5.8 pH going in and coming out is 6.1 the actual pH of the mmedeium is above 6.1 I'd venture to say more than 3 points higher something like 6.4
So 1200 ppm run off and your only adding 1.5 ml/L? Do you know the ppm going in?
They use to say when in doubt flush it out. That way you coveted the bases so to speak.
I would mind moving on to soil density and aeration or humidity air exchange and us help you narrow this down but we haven't eliminated pH or lock out posiblitys, or maybe we have, I apologize for not mentioning for you to check your ppm but it's really looking like there's some lockout going on that's why we check the pH going in and going out, cuz the higher runoff pH is indicating lockout and salts.
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