A few studies of nutrient accumulation in plant tissue, have led to the idea that Ca and Mg are needed most in the latter half of flower. There is a chart of this often posted from an additives supplier. Aptus I think.
My own studies of the runoff show they are right about Mg. Other studies have found half the Ca is already in the plant at that point though. Methods of increasing Ca early are coming forth, and a look at peoples grows see's most LED growers are not raising the Ca in the latter half of bloom. Guided by results, they are more likely to drop the Ca and increase Mg.
I look at the idea of lowering Ca in favour of Mg as well based. I too see the same Mg like signs on one strain that come late, and are quite tied to high EC also. So I need more Mg but also there is something antagonising it. Well.. there always is, but it's more the problem than an actual lack of Mg. Calcium and K are the only likely culprits.
I see strong visual evidence that Ca needs lowering, along with a mild raise in Mg. Some time into the latter half of bloom. 25 days is early, but then a lot of Ca has been added.
My own studies of the runoff show they are right about Mg. Other studies have found half the Ca is already in the plant at that point though. Methods of increasing Ca early are coming forth, and a look at peoples grows see's most LED growers are not raising the Ca in the latter half of bloom. Guided by results, they are more likely to drop the Ca and increase Mg.
I look at the idea of lowering Ca in favour of Mg as well based. I too see the same Mg like signs on one strain that come late, and are quite tied to high EC also. So I need more Mg but also there is something antagonising it. Well.. there always is, but it's more the problem than an actual lack of Mg. Calcium and K are the only likely culprits.
I see strong visual evidence that Ca needs lowering, along with a mild raise in Mg. Some time into the latter half of bloom. 25 days is early, but then a lot of Ca has been added.