So these girls are about 3 weeks into veg, been in these pots/soil for almost the entire veg time and about 2 days ago was their first decent sized watering of just over a litre each, no nutes added other than calmag at a ratio of 0.5ml per litre as the soil I’m using is fortified with organic fertilisers and bat guano (bat special) and this has slowly crept in which I’m guessing is nute burn but not feeling entirely sure, never really seen the lightening of the leaves behind the burnt tips before? It says the soil is rich and I did get a little clawing when I grew my blueberry in it but nothing like this.
Did you check the EC on your runoff water ?
Theyre in 5 gallon pots, at this stage to get a decent amount of run off id have to drown them so havnt checked but the write up of info for the mix says its between 1.2 to 1.5 out of the bag and ive added no other nutes than the calmag.
Looks like it could be magnanese, magnesium, or zinc. Which, looking through the forums and other sites, is a very very common issue. Or it could be a phosphorus abundance as that can mimic mag/zinc deficiencies. But there’s definitely something imbalanced there. I hope this chart helps.
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I used some great soils on my indoor grow and the bag said that it was 1.5 EC but when I had issues I drowned one and the runoff EC was 6
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Looks to be K def.
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appreciate the help people, i repotted a jack herer cross that ive got in as a mother and i mixed in some biobizz lightmix with the bat special, bout 40% lightmix and its doing a hell of alot better than my dos di dos for being a younger plant, think that may be the way forward in future grows
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