Question about N deficiency during flowering.....

[chiefMOJOrisin]

How early is too early for a plant in its flowering stage to become nitrogen deficient??

I know all plants become N deficient during/towards the end of flowering. I was just wondering when its a problem.

I have 4 plants flowering now which are on day 10 of 12/12. One of which has a magnesium deficiency during veg. That same plant has some yellow leaves on the first nodes of the bottom growth shoots. I know its a N deficeincy because I've grown before and dealt with it before. I'm just wondering when it becomes detrimental to the plant.


The leaves didn't start yellowing when flowering started....they were already starting during veg. Like i said, the plant was sick. For the first month or so of veg I had a somewhat difficult time finding the problem and then fixing it. I eventually did, and the plant started growing very well. Yet some leaves continued to yellow. None on the top half of the plant, and none of the new leaves. The plant has about 15 noes on the main stem. The longest growth shoot has 7 nodes. The bottom 4-5 growth shoots are the one with the yellow leaves...... but only the bottom 2-3 nodes on the growth shoots themselves.

[chiefMOJOrisin]

Yellow hello????

[motorheed]

Originally Posted by chiefMOJOrisin

How early is too early for a plant in its flowering stage to become nitrogen deficient??within a week or 2 max.

I know all plants become N deficient during/towards the end of flowering. I was just wondering when its a problem. not really a problem mate even right up till harvest time.

I have 4 plants flowering now which are on day 10 of 12/12. One of which has a magnesium deficiency during veg. That same plant has some yellow leaves on the first nodes of the bottom growth shoots. I know its a N deficeincy because I've grown before and dealt with it before. I'm just wondering when it becomes detrimental to the plant.its a prob now mate too early for signs of n deficiency 10 days in2 flower. also it becomes detrimental to the plant when signs show, so now!........ feed it a one off full dose feed of your veg nutes(if using 1000watt lights if not using 1000watts then feed 1/2 strength),then keep feeding veg nutes(1/4 strength) with your bloom nutes fading them out by 7th week,then starve them of all nutes.

will show signs of recovery within a week-10 days after feeding veg nutes.


The leaves didn't start yellowing when flowering started....they were already starting during veg. Like i said, the plant was sick. For the first month or so of veg I had a somewhat difficult time finding the problem and then fixing it. I eventually did, and the plant started growing very well. Yet some leaves continued to yellow. None on the top half of the plant, and none of the new leaves. The plant has about 15 noes on the main stem. The longest growth shoot has 7 nodes. The bottom 4-5 growth shoots are the one with the yellow leaves...... but only the bottom 2-3 nodes on the growth shoots themselves.

if plant was showing signs during veg what was your n-p-k in your medium?

[toastybiz]

My guess is you are going to be fighting this N problem throughout flowering, with the yellowing chasing the buds up the stalk and branches. You can try to give back a little N by mixing the ferts one 1 or 2 feedings of half flower fert and half veg fert, or else just use your flower fert but supplement with diluted urine (yes, can be used for a nitrogen boost). But you don't want to give too much N as it can retard bud growth.

[chiefMOJOrisin]

Motor....I use Fox Farm Potting Soil (Ocean Forest) for all my plants. And if you've used their soil before you know it doesn't list NPK amounts. However, the plant in question was sick with a mag. deficiency during early veg when I transplanted everyone else into their final homes so she got t-planted later....... when I only had half as much Fox Farm as I needed. So I added a bunch of pearlite and (forgive me organical gods) maybe 3 cups of Miracle grow poting soil. The M-Gro soils NPK was listed at .02-.02-.02.

If today is the day I think it is, then today is day 14 of 12/12.

These are the ferts I have readily available to fix the problem (or try to):

• Age Old Organics 'Grow' (12-6-6) and 'Bloom' (5-15-5)
• Blue Seal Organic Plant Food with alfalfa, soy bean and fish emulsion (5-5-5)
• Holland's Bloom Booster....never used because I'm strive for 100% organic. Its NPK is something like huge like 10-51-10.

I don't plan to ever use the Holland's...I just have it because it was sitting inside a big pot in my garage that I needed for transplant. I hang on to it in case its the only thing that will save a plants life. And thats the only reason I will use it.....if its the only thing that can help. The Age Old is water soluble so that can be, and I do make dilluted solutions. My normal regimen starts with 1/4 strength, then a week later 1/2 strength, and so on.

I'm not really sure what brand the other food is. Theres a little logo on the back that says 'Blue Seal'...but thats it. The label says Simple 'n Safe Plant Food 5-5-5. I know it's organic because I bought it at the same store (only one within 30mins of me) that I got my Fox Farm from. I asked for organic food and that was among the best that was affordable at the time. To apply the 5-5-5 it says to work food into the top 2-3 inches of soil and then water,

Which food would work best?? Perhaps a 1/2 dose of the 5-5-5 and continue my 'Bloom' (5-15-5) on schedule??



I've known that an N def. towards the end of flowering isn't a bad thing.....perhaps even beneficial from some things I've read. But I also know that unwanted deficiencies can greatly reduce yeild. And the whole reason for growing herb is to get free herb.....anything making my yeild smaller is a big problem.



One thing I've always battled with.....and argued with others..... is whether or not the yellow leaves should be cut off. What I do is pull on them ever so slightly....not even enough force to pull a cig out of a pack. If they show any resistance I leave them because I figure they are still capable of making food. If they fall off, then they were going to fall of very shortly anyhow.

What do you think?

[motorheed]

Originally Posted by chiefMOJOrisin

Motor....I use Fox Farm Potting Soil (Ocean Forest) for all my plants. And if you've used their soil before you know it doesn't list NPK amounts. However, the plant in question was sick with a mag. deficiency during early veg when I transplanted everyone else into their final homes so she got t-planted later....... when I only had half as much Fox Farm as I needed. So I added a bunch of pearlite and (forgive me organical gods) maybe 3 cups of Miracle grow poting soil. The M-Gro soils NPK was listed at .02-.02-.02.

If today is the day I think it is, then today is day 14 of 12/12.

These are the ferts I have readily available to fix the problem (or try to):

• Age Old Organics 'Grow' (12-6-6) and 'Bloom' (5-15-5)
• Blue Seal Organic Plant Food with alfalfa, soy bean and fish emulsion (5-5-5)
• Holland's Bloom Booster....never used because I'm strive for 100% organic. Its NPK is something like huge like 10-51-10.yeh is strong,never used it myself

I don't plan to ever use the Holland's...I just have it because it was sitting inside a big pot in my garage that I needed for transplant. I hang on to it in case its the only thing that will save a plants life. And thats the only reason I will use it.....if its the only thing that can help. The Age Old is water soluble so that can be, and I do make dilluted solutions. My normal regimen starts with 1/4 strength, then a week later 1/2 strength, and so on. sound,plants can retain nutes for weeks so your schedule looks good to me mate

I'm not really sure what brand the other food is. Theres a little logo on the back that says 'Blue Seal'...but thats it. The label says Simple 'n Safe Plant Food 5-5-5. I know it's organic because I bought it at the same store (only one within 30mins of me) that I got my Fox Farm from. I asked for organic food and that was among the best that was affordable at the time. To apply the 5-5-5 it says to work food into the top 2-3 inches of soil and then water,

Which food would work best?? Perhaps a 1/2 dose of the 5-5-5 and continue my 'Bloom' (5-15-5) on schedule??go for 1/4 strength with your 5-5-5 & yeh continue your normal bloom feed, allways best to under feed easier to rectify if needed, but heres hoping you wont mate.



I've known that an N def. towards the end of flowering isn't a bad thing.....perhaps even beneficial from some things I've read. But I also know that unwanted deficiencies can greatly reduce yeild. And the whole reason for growing herb is to get free herb.....anything making my yeild smaller is a big problem.i keep using my grow(veg nutes)up till 7th or so week then starve just my personal preference,but reason i do it is for lush green leaves which are the solar panels(so too speak)of the plant ,giving more yield & better tasting,smooth smoke



One thing I've always battled with.....and argued with others..... is whether or not the yellow leaves should be cut off. What I do is pull on them ever so slightly....not even enough force to pull a cig out of a pack. If they show any resistance I leave them because I figure they are still capable of making food. If they fall off, then they were going to fall of very shortly anyhow.

What do you think?

only remove the yellow leaves if 50% or more damaged ,as you say they are still capable of feeding your ladies but also they are usefull for getting rid of any toxins within the plant,so leave them on and do excactly as you are doing by removing the way you & i do.

all the best M.

[chiefMOJOrisin]

Originally Posted by motorheed

only remove the yellow leaves if 50% or more damaged ,as you say they are still capable of feeding your ladies but also they are usefull for getting rid of any toxins within the plant,so leave them on and do excactly as you are doing by removing the way you & i do.

all the best M.

Thanks for the feedback, man. I appreciate it. Hopefully she's not already too far into it. I just measured her this morning ans she is about 26" tall.....with the yellow leaves no higher than 8" up. So there is still a lot of plant to save.

I'll try and give an update in a week or so to let ya know how she's doing.