I use the Lucas formula with Cal Magic throughout my grow.
In veg I run 600-800ppm or 1-1.2 ec. This is where my system shines compared to my hand watering days.
I'll see inches of growth a day, but in flower the differences, for me, are more subtle.
After the stretch in flower I'll crank it up to about 1.4 ec that's when the hardier afghanis thrive and I burn the tips of the Kushes, Chems and higher Sativa plants.
I actually had someone suggest a K toxicity on my last grow. I don't know? I reuse my coco, constantly adding new to old for a few years now. I hear that coco releases a lot of K as it breaks down.
Which makes me want to try using a coco specific nutrient with lower K and S values as a comparison to my Lucas regimen.
Cool. The only reason I suggested a lack of K was just because it can present as nute burn but with more yellowing between the veins.
I believe its the other way around. The process of making coco gives it a very high K and S content pre it been buffered
When they buffer it they wash it with Calcium which replaces the K due the high CEC and it washes away most of S too. With coco nutrients you end up with a lot more calcium due to the ions attracting the Calcium and locking some of it out, so they whack lots in to counter that problem. It also latches on to magnesium but the magnesium is more available to the root system but when the calcium is locked up it takes a really long time to release tiny amounts at a time.
Where did you hear it breaks down and releases K? I would love to find out more. Please don't take that as doubting your word, I'm still finding lots of new info on coco even after recycling mine for going on 7 years.
If you use dehydrated coco then it would defo release some K as we cant buffer it on the scale the guys at canna for example do.
I wonder if there is more K in the coco specific nutes now. Whats the NPK of the lucas formula? Canna coco is 5-4-3 not including pk boost,
Edit, I misinterpreted the info, your correct, coco nutrient have less K to account for what's in the coco. I figured when it was buffered most of it was removed but apparently not. Cheers for that Bakersfield.