[Douglas.Curtis]

For what it's worth, I've been flowering with versions of the Lucas Formula for 15 years now. When I keep the strength low, transpiration high and allow a full and natural pH swing, the resulting cannabis smoke is so soft, tasty and aromatic it's literally unbelievable. I lightly used Kool Bloom powder a couple times and quit, due to the quality hit. Come to think of it, I still have the jar of it from years ago, lol.

So, in my opinion, the element mix is very close with the Lucas Formula and I'd start there. I use magnesium sulfate (epsom salt) to tailor magnesium levels for individual strains. The Lucas formula is a bit shy on magnesium for many strains and being able to vary the mag content with epsom additions works out extremely well.

[nxsov180db]

Originally Posted by Spaventa

I PK 3 weeks from harvest for a week. I cut back the bloom nutes to keep the EC optimum. I use Canna everything and do what it says on the label, never failed me. Yield and quality go up by 20 percent at least.

Btw - Canna is 13/14. Ive never tried the other ratios others do.. if it ain't broke and all that

Do you use all products on the canna chart? If you go by the chart during that 1 week of using PK 13/14 it gives you:

N 103
P 156-165
K434-450

That seems like an insane amount of K lol. If you are only using the Aqua Flores and PK 13/14 it gives you:

N103
P126
K394

[nxsov180db]

Originally Posted by Douglas.Curtis

For what it's worth, I've been flowering with versions of the Lucas Formula for 15 years now. When I keep the strength low, transpiration high and allow a full and natural pH swing, the resulting cannabis smoke is so soft, tasty and aromatic it's literally unbelievable. I lightly used Kool Bloom powder a couple times and quit, due to the quality hit.

How much KB powder did you try? I used the Lucas ratio with GH Micro/Bloom a few times and tryed it with KB powder and it caused some issues lol. Lucas gives a decent amount of P and K and plenty of Mg, I can't imagine any strain needing more Mg than it provides. If you do the 8ml micro 16 ml bloom (which is kind of strong) you get:

N 105
P 92
K 158
Mg 63
Ca 106

[Douglas.Curtis]

Originally Posted by nxsov180db

How much KB powder did you try? I used the Lucas ratio with GH Micro/Bloom a few times and tryed it with KB powder and it caused some issues lol. Lucas gives a decent amount of P and K and plenty of Mg, I can't imagine any strain needing more Mg than it provides. If you do the 8ml micro 16 ml bloom (which is kind of strong) you get:

N 105
P 92
K 158
Mg 63
Ca 106

Yes, some strains are much hungrier for mag than others, I assure you. The more light you're running, the higher the mag requirements are. There are definitely some strains which don't seem to need much at all. Again, the added sulfur increases terpene production as well, which is a very nice bonus.

At approximately 30 days in flower I used 1/4 teaspoon of powdered Kool Bloom, for 35 gallons of nutrient solution. I wanted to start slow and easy and was very disappointed, didn't try more. Definite increase in harshness of the end smoke, even with such a small addition.

[nxsov180db]

Originally Posted by Douglas.Curtis

Yes, some strains are much hungrier for mag than others, I assure you. The more light you're running, the higher the mag requirements are. There are definitely some strains which don't seem to need much at all. Again, the added sulfur increases terpene production as well, which is a very nice bonus.

At approximately 30 days in flower I used 1/4 teaspoon of powdered Kool Bloom, for 35 gallons of nutrient solution. I wanted to start slow and easy and was very disappointed, didn't try more. Definite increase in harshness of the end smoke, even with such a small addition.

I knew some strains were hungrier than others for Mg, just not that hungry lol.. I recently had symptoms of too much Mg so I had to back off, I think I was around 45ppm of Mg in my feed formula. I use tap water but it is only 50ppm total I don't know how much of that is Mg or anything else but I don't think it can be that much, I do plan on getting it tested at some point just so I know..

[nxsov180db]

Originally Posted by Douglas.Curtis

At approximately 30 days in flower I used 1/4 teaspoon of powdered Kool Bloom, for 35 gallons of nutrient solution.

1/4 tsp per gallon right? Not 1/4 tsp for the entire res..

[jidoka]

Did you mention what media you are using?

[Absolem]

Originally Posted by nxsov180db

Do you use all products on the canna chart? If you go by the chart during that 1 week of using PK 13/14 it gives you:

N 103
P 156-165
K434-450

That seems like an insane amount of K lol. If you are only using the Aqua Flores and PK 13/14 it gives you:

N103
P126
K394

It sure is a ton of PK. Canna does that to reset the cation exchange in the coco coir to favor more k. With Canna they have you add more of A and B as the grow advances. Adding more A increase N and Ca so they jam the pk to offset the Ca for flower.

I've ran my P as low as 40pmm in flower until week 6 when the plants no longer looked the right color green. I didn't notice any effect on the buds in respect to size. I don't really see a need to go over 80ppm of P in flower. I run P around 35ppm in veg kick it up to 60ppm in flower then week 3-5 I'll push it up to 80ppm. Adding more P in early flower will make the plants stretch more.

I grow in coco so I run less K due to coco coir releasing k at a rate of 30-50ppm as it degrades at a constant rate.

Peace

[nxsov180db]

Originally Posted by jidoka

Did you mention what media you are using?

I don't use any media. Aeroponics.

[nxsov180db]

Originally Posted by Absolem

It sure is a ton of PK. Canna does that to reset the cation exchange in the coco coir to favor more k. With Canna they have you add more of A and B as the grow advances. Adding more A increase N and Ca so they jam the pk to offset the Ca for flower.

I've ran my P as low as 40pmm in flower until week 6 when the plants no longer looked the right color green. I didn't notice any effect on the buds in respect to size. I don't really see a need to go over 80ppm of P in flower. I run P around 35ppm in veg kick it up to 60ppm in flower then week 3-5 I'll push it up to 80ppm. Adding more P in early flower will make the plants stretch more.

I grow in coco so I run less K due to coco coir releasing k at a rate of 30-50ppm as it degrades at a constant rate.

Peace

The feed chart I referenced wasn't for coco.