Anyone use Green planet dual fuel & pro-cal with coco coir? Or can give advice?

[KootenayFullyAutomatic]

For the strength of the flowering mix, I would base it on the N in the final strength you arrived at during vegetative and aim for ~33%-50% less N during flower.

Sorry for all the questions. But, How exactly would I calculate this?

 

[Bruce Campbell]

I have tried to find some info on germination, but not much luck other than “feed from seed, and feed light” so I guess I’ll start 1/4 and see how they react, should only be a couple feeds in the first week anyway.

Germination and seedling (first 2 weeks) can be tough to figure out beforehand - it's a balance between giving some nutrients, but not too much, and not overwatering. Everyone seems to have their own way that works for them, and each strain and seed can be a bit different.

I'd recommend finding a grow journal with a method that worked, and try to follow that. I know MassMom recently germinated in coco:

https://www.autoflower.org/threads/moms-ongoing-autopot-autocob-mc-coco-grow.84422/

For the strength of the flowering mix, I would base it on the N in the final strength you arrived at during vegetative and aim for ~33%-50% less N during flower.

Basically, you're using / measuring EC to determine / adjust / dilute strength because EC varies linearly with concentration (for a given nutrient ratio).

The usual goal is to increase strength during veg until you run into problems, which normally means "until the leaves start looking a bit dark green from too much N". Then, during the flowering stage, people usually reduce N while wanting to keep and/or increase P. The exact amounts are debatable and usually a matter of personal preference.

So, if you end up using Veg #2 at 75% strength at the end of vegetative, that would mean you're using about (160 x 0.75) = 120 ppm N. If you want to target 33% less nitrogen during flower, then that would mean 80 ppm N. Since the full-strength flowering formula has 100 ppm N, that means you would want to use it at 80% strength during flowering. If you want to target 50% less nitrogen (60 ppm), then you would want to use the flowering formula at 60% strength instead.

Granted, you're also getting less P at each of those reduced strengths, but it should still be sufficient. If you wanted to reduce N without reducing P, you would need to modify the formula ratios accordingly.

 

[Del boy]

Hello i grow with coco and green planet 4 part hydro i know its not the same as duel fuel i run 3/4 strenth from start to finish and stick to what they say. Green planet is very forgiving i would not mix and match nutes from diffrent companies else you fck the balance up and will give your self more issues
these girls are grown with there feed schedule at 3/4 strenth

Happy growing you know it makes sense

 

[budwise]

Hello i grow with coco and green planet 4 part hydro i know its not the same as duel fuel i run 3/4 strenth from start to finish and stick to what they say. Green planet is very forgiving i would not mix and match nutes from diffrent companies else you fck the balance up and will give your self more issues
these girls are grown with there feed schedule at 3/4 strenth
View attachment 1377739View attachment 1377740
View attachment 1377741
Happy growing you know it makes sense

very nice work on these

 

[KootenayFullyAutomatic]

Hello i grow with coco and green planet 4 part hydro i know its not the same as duel fuel i run 3/4 strenth from start to finish and stick to what they say. Green planet is very forgiving i would not mix and match nutes from diffrent companies else you fck the balance up and will give your self more issues
these girls are grown with there feed schedule at 3/4 strenth
View attachment 1377739View attachment 1377740
View attachment 1377741
Happy growing you know it makes sense

Nice those look great, I’m not mixing anything from another brand, just changing the formula. I’ve done a couple runs with dual fuel in Promix with not much luck. (Under 1oz a plant)

 

[KootenayFullyAutomatic]

Germination and seedling (first 2 weeks) can be tough to figure out beforehand - it's a balance between giving some nutrients, but not too much, and not overwatering. Everyone seems to have their own way that works for them, and each strain and seed can be a bit different.

I'd recommend finding a grow journal with a method that worked, and try to follow that. I know MassMom recently germinated in coco:

https://www.autoflower.org/threads/moms-ongoing-autopot-autocob-mc-coco-grow.84422/

Basically, you're using / measuring EC to determine / adjust / dilute strength because EC varies linearly with concentration (for a given nutrient ratio).

The usual goal is to increase strength during veg until you run into problems, which normally means "until the leaves start looking a bit dark green from too much N". Then, during the flowering stage, people usually reduce N while wanting to keep and/or increase P. The exact amounts are debatable and usually a matter of personal preference.

So, if you end up using Veg #2 at 75% strength at the end of vegetative, that would mean you're using about (160 x 0.75) = 120 ppm N. If you want to target 33% less nitrogen during flower, then that would mean 80 ppm N. Since the full-strength flowering formula has 100 ppm N, that means you would want to use it at 80% strength during flowering. If you want to target 50% less nitrogen (60 ppm), then you would want to use the flowering formula at 60% strength instead.

Granted, you're also getting less P at each of those reduced strengths, but it should still be sufficient. If you wanted to reduce N without reducing P, you would need to modify the formula ratios accordingly.

Word, thanks. Do you think it’s worth it to grab their PK spike? Or is your chart about as balanced as I’ll get?

And I’ll check out the grow guide aswell. Although I find germination quite easy directly in substrate, just confused on how to go from day 1 sprout on.

 

[Del boy]

Nice those look great, I’m not mixing anything from another brand, just changing the formula. I’ve done a couple runs with dual fuel in Promix with not much luck. (Under 1oz a plant)

what makes you think you need to change the formula? if you are getting 1oz a plant its not the nutes there must be something else going on i get a 0z out of a solo cup

 

[KootenayFullyAutomatic]

what makes you think you need to change the formula? if you are getting 1oz a plant its not the nutes there must be something else going on i get a 0z out of a solo cup

Well the ~1oz may actually not have been a factor of the nutrients, as I do have some bigger ones now. but I have been running into deficiencies while also seeming to have toxicities when my PH is good.

and also they don’t really seem to give much of a guide for their pro-cal (part of why I posted here was to ask about the cal/mag) and their rep doesn’t seem to want to give me much of a straight answer to some of these things.

really temped to give kdawgs chart a run and see how it fairs compared to what I was doing before. (Basically just followed the dual fuel chart, start at 1/4 dose and usually be 50%+ by flower) His write up looks super legit to me, and if I can get away with using less bottles for a more balanced NPK ratio, I’m all for it.

 

[Del boy]

Well the ~1oz may actually not have been a factor of the nutrients, as I do have some bigger ones now. but I have been running into deficiencies while also seeming to have toxicities when my PH is good.

and also they don’t really seem to give much of a guide for their pro-cal (part of why I posted here was to ask about the cal/mag) and their rep doesn’t seem to want to give me much of a straight answer to some of these things.

really temped to give kdawgs chart a run and see how it fairs compared to what I was doing before. (Basically just followed the dual fuel chart, start at 1/4 dose and usually be 50%+ by flower) His write up looks super legit to me, and if I can get away with using less bottles for a more balanced NPK ratio, I’m all for it.

Hello if you think it will work better go for it the only problem i see with copying some one else is you never get to understand where you are going wrong.Kdawgs program works for him in his enviroment but who is to say it will for you in your set up i have made plenty of mistakes but each time i learned from them and now its plain sailing

 

[KootenayFullyAutomatic]

Hello if you think it will work better go for it the only problem i see with copying some one else is you never get to understand where you are going wrong.Kdawgs program works for him in his enviroment but who is to say it will for you in your set up i have made plenty of mistakes but each time i learned from them and now its plain sailing

Actually, he’s never even used it. Pretty sure he made it based on information and studies about optimal nutrient level in plants, and adjusted the dual fuel dosage to meet those optimal nutrient levels in a more balanced ratio for cannabis than what green planets chart is. For me I think it will be easier to scale dual fuel as needed if I use it the way kdawg is describing.
I think my main issue has been dialing in the correct ratios for everything, as green planets feed chart only really just suggests to use dual fuel and the additives at their given rate with no real reason why, and pretty much 0 info on pro-cal other than “use at 4.5ml/gal”.

seems like kdawg has a decent understanding on how nutrients and nutrient levels work, and has provided MUCH more information on what nutrient levels are what and how much is ideal, where as green planet will always just say “use this, why? Because we say so”