do i use nitrogen suppliment food in vegging or flowering?

[KragenKloud19]

Ok, im growing all organicly and i use miracle grow organic fertilizer...i have bone meal and blood. Bone meal has phosphorous and the blood meal has nitrogen, in with order are they needed for vegging and flowering?

KragenKloud19 Reviewed by KragenKloud19 on 04-20-2011. do i use nitrogen suppliment food in vegging or flowering? Ok, im growing all organicly and i use miracle grow organic fertilizer...i have bone meal and blood. Bone meal has phosphorous and the blood meal has nitrogen, in with order are they needed for vegging and flowering? Rating: 5

[319]

I use the same MG product well the blood meal. The NPK numbers will not support cannabis throughout the flowering process.

These products could support growth to the 2nd week of flower. Honestly I read this a few times that said that you need to reduce your phosphorous levels after the 1st or 2nd week of flower. They said that this could prolong the flowering period. But I would take this advice with a grain of salt as I haven't heard this from a valid source.

Anyway I would buy the Marijuana Garden Saver if you choose to go the MG only route, this will help you identify possible deficiencies that might occur.

319

[mickrick]

read this buddy..ogfaq.

What do the three numbers on the fertilizer label stand for?
Most people believe N-P-K to stand for the nitrogen, phophorous, and potassium, but that is somewhat incorrect. These are commonly referred to as the major elements along with calcium, magnesium, and sulphur. They are the major contributing compounds in plant growth.

N: nitrogen, used to stimulate new vegetative growth and overall health.
P2O5: phosphorus oxide, used to stimulate flower development and rooting.
K2O: potassium oxide, used to stimulate stem growth and overall health

N-P-K ratings on the labels of fertilizers are misleading at best. They represent N: nitrogen, P2O5: phosphorus oxide, and K2O: potassium oxide. These molecular compound ratios are not the same as the elemental ppm of the associated primary element, except in the case of N. They are only the guaranteed minimum amount of the molecular compound.

For example:
A fertilizer labeled 30-10-10 can have up to a total of 80% N, along with 10% P2O5, and 10% K20 and still be "accurate". It could have any combination of N, P2O5 and K2O adding up to 100%, as long as it has at least the MINIMUM listed of any of the three. You could have 50% nitrogen in 10-30-20. These types of labels are misrepresentative. Anyone using them to establish a controlled nutrient balance is not doing their plants any service.

As a general guidline, the N-P-K numbers can be roughly converted to elemental ppm. N, nitrogen is the only element to convert from the label at the ratio of 1 to 1. P2O5, phosphorus oxide, converts to elemental P, phosphorous at a ratio of 1 to .4. K2O, potassium oxide, converts to elemntal K, potassium at a ratio 1 to .8. This demonstrates the radical difference between an N-P-K of 1-1-1 and an actual elemental ratio of 1-.4-.8.

I have only found Botanicare and Green Air Products Genesis nutrients to give the actual ELEMENTAL ppm after dilution. I used to mix my own solutions from ammonium nitrate, calcium nitrate, magnesium nitrate, potassium nitrate, potassium phosphate and other reagents and know from nutrient analysis of the misleading nature of N-P-K labels.
Added by: MisterIto
ogfaq..

[319]

I didn't see your reply until tonight due to me never checking my replies. I understand synthetic N-P-K numbers and don't have to find another forums post to prove my point. Even with your reply it still doesn't support the use of the product(s) throughout the life cycle of MJ.

Basically what that post is speaking about are the inconsistencies within nutrient manufacturers. But the OP could have went deeper into the volatility of synthetic N once out of the bottle the 1/3 that you automatically lose due to leeching in soil. Another reason why you can't 100% rely on synthetics in soil. IMO.

Lets say you enter the 4th or 5th week of bloom, where I see most of the problems occurring and you want to increase your P intake without increasing the N. How are you going to accomplish this? How can you achieve a very basic 238-725-848 ratio that Roots Organics will give you. Or in my 5th week 300-872-1488 ratio that I use with my Earth Juice? Even if you can use those two bags to achieve this then you'll run into the problem of not having immediate available nutrients that plants need. Where as MG is pretty much a slower released product, this is why its a soil amendment.

This is also why I recommended the Garden Saver book.

I have written down Advanced Nutrients NPK ratio, Roots Organics NPK ratio and a few others and will post pictures when I can. You should look into an other manufacturers average dose rate write down the NPK numbers and see where that leaves you.

All I'm saying is that I have the same product that he has and I like it. Does it work as a good soil amendment? Yes. Would I use this as my primary nutrient? Hell no.

If your looking for a water only system then look into Subcool soil recipe.

read this buddy.. :thumbsup:
Subcool's Super Soil

-319

[319]

Last thing I would like to add, this possibly is the best advice that I have received on cultivating.

"Get out of the books and get into a grow room"