flower yellowing?

Just want to be sure. Does this look like the plant utilizing nitrogen for the buds or is something else at play here?
Im a month into flower, first pistils were around 8/8.

Its critical auto. In natures living soil. I put some jobes fert spikes in it a bit before flower. Wondering if the rain ive had has released more ferts and is burning the plant maybe?

Its also gotten a good bit colder lately here in MN(im just setting up an indoor tent for these two). The yellowing started before the cold snap though

Looks like it needs some feed.

The Gram Reaper said:

Looks like it needs some feed.

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Any suggestions for what type nutes and ratio? I use gh trio for my indoors. Should i mix up a batch based on their mid flower and go with that?

I would say that they are hungry

That all depends on you, I would use a liquid feed. Focus on cal/mag and PK heavy nutes. Could probably use nitrogen but keep it low, most cal/mag has nitrogen.

The Gram Reaper said:

That all depends on you, I would use a liquid feed. Focus on cal/mag and PK heavy nutes. Could probably use nitrogen but keep it low, most cal/mag has nitrogen.

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Ok. I have fox farm big bloom and some organic cal/mag.....i believe that should work?

Make sure to follow the directions should be good to go as always thank you for your time

Jeffislovinlife said:

Make sure to follow the directions should be good to go as always thank you for your time

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Thank you for your time good sir

You are in week 5 of flowering by the date you showed.

Simple. 5 mil (or 1 tsp) of grow big each feeding for this week and next week should fix your issue here. Assuming you water only in between feedings.

It is not a situation where all nitrogen gets thrown out the window quite yet.

Just a question...what week do you cut out all nitrogen? I have a plant that looks similar but it's a lil further along. I'm in day 40 of flowering so end of week 6 start of week 7 and for the last 2 weeks I've just been giving her beastie bloomz as a stand alone.

dravenvlad said:

Just a question...what week do you cut out all nitrogen? I have a plant that looks similar but it's a lil further along. I'm in day 40 of flowering so end of week 6 start of week 7 and for the last 2 weeks I've just been giving her beastie bloomz as a stand alone.

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You'll always want some base nitrogen in the plants until you begin your flush at the last 2 weeks of the plants life with just feeding plain water. The green in the leaves is going to tell you how much is there. The yellowing in these pictures on these outdoor plants is entirely normal for this time of year. It's "Fall" for the cannabis plants they're going to turn all sorts of colors and start dropping leaves as they ripen and mature also get cold & wet outside and less light.

As if! said:

Just want to be sure. Does this look like the plant utilizing nitrogen for the buds or is something else at play here?
Im a month into flower, first pistils were around 8/8.

Its critical auto. In natures living soil. I put some jobes fert spikes in it a bit before flower. Wondering if the rain ive had has released more ferts and is burning the plant maybe?

Its also gotten a good bit colder lately here in MN(im just setting up an indoor tent for these two). The yellowing started before the cold snap though

View attachment 4677856View attachment 4677857View attachment 4677858

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Honestly it looks like the plants were under-fertilized and its a bit late to fix that. Lots of the color change is going to be normal this time of year especially in your state.

calvin.m16 said:

Honestly it looks like the plants were under-fertilized and its a bit late to fix that. Lots of the color change is going to be normal this time of year especially in your state.

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calvin.m16 said:

You'll always want some base nitrogen in the plants until you begin your flush at the last 2 weeks of the plants life with just feeding plain water. The green in the leaves is going to tell you how much is there. The yellowing in these pictures on these outdoor plants is entirely normal for this time of year. It's "Fall" for the cannabis plants they're going to turn all sorts of colors and start dropping leaves as they ripen and mature also get cold & wet outside and less light.

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Ah ok I got you. Thanks for the info Calvin. I think I still had some base nitrogen in mine until the end of august so she is only been without nitro for roughly a week and she only has 2 to 2 and 1/2 weeks left so i sgould be ok then. Hopefully. Keeping my fingers crossed. Lol.

dravenvlad said:

Ah ok I got you. Thanks for the info Calvin. I think I still had some base nitrogen in mine until the end of august so she is only been without nitro for roughly a week and she only has 2 to 2 and 1/2 weeks left so i sgould be ok then. Hopefully. Keeping my fingers crossed. Lol.

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You got this!

Thanks calvin. For my future growing what are the symptoms that led you to underfeeding being the issue?

Ive researched this and other plants issues but it seems like a lot of symptoms are similar across the range of potential issues.

calvin.m16 said:

Honestly it looks like the plants were under-fertilized and its a bit late to fix that. Lots of the color change is going to be normal this time of year especially in your state.

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As if! said:

Thanks calvin. For my future growing what are the symptoms that led you to underfeeding being the issue?

Ive researched this and other plants issues but it seems like a lot of symptoms are similar across the range of potential issues.

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I know one way you can tell if they are underfertilized during veg is by looking at the fan leaves. If they are really dark green then you have a surplus of nitrogen. If they start becoming light green then they don't have enough nitrogen. You want something that is a lil higher in nitrogen during veg and then something that is lower in nitrogen and higher in phosphorus and potassium when they start flowering. I slowly transitioned mine during preflower. Now as it gets later in flowering some fan leaves will yellow starting at the bottom and this is normal some will start to do it in the 3rd or 4th week of flowering and some will do it later. Mine started doing it toward the end of week 6 start of week 7. They do this because she doesnt want to waste any resources so she starts pulling stored nitrogen out of the fans to help with resin production and bud fattening to my understanding. Do you know what week of flowering you are in?

Thanks a bunch for the thorough response

Im in the 5th week. I saw the first pistils on 8/8

Gauging fert by color of fan leaves is very helpful. I overdid everything in my first grow. In this one i e been gun shy to over fert.

Also this plant is grown in natures living soil and ffof. I added some jobes spikes a bit before flower due to this happening on my first grow. Ill use liquid nutes next time

dravenvlad said:

I know one way you can tell if they are underfertilized during veg is by looking at the fan leaves. If they are really dark green then you have a surplus of nitrogen. If they start becoming light green then they don't have enough nitrogen. You want something that is a lil higher in nitrogen during veg and then something that is lower in nitrogen and higher in phosphorus and potassium when they start flowering. I slowly transitioned mine during preflower. Now as it gets later in flowering some fan leaves will yellow starting at the bottom and this is normal some will start to do it in the 3rd or 4th week of flowering and some will do it later. Mine started doing it toward the end of week 6 start of week 7. They do this because she doesnt want to waste any resources so she starts pulling stored nitrogen out of the fans to help with resin production and bud fattening to my understanding. Do you know what week of flowering you are in?

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As if! said:

Thanks a bunch for the thorough response

Im in the 5th week. I saw the first pistils on 8/8

Gauging fert by color of fan leaves is very helpful. I overdid everything in my first grow. In this one i e been gun shy to over fert.

Also this plant is grown in natures living soil and ffof. I added some jobes spikes a bit before flower due to this happening on my first grow. Ill use liquid nutes next time

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Your welcome. I'm still learning myself as well about what is best to use and so on as far a nutes go. I'm not familiar with the jobes spikes but I'll look up the npk on those and maybe have a better idea of what you are working with. Like I said you don't want too much nitrogen at that stage and want to focus mainly on heavy phosphorus and potassium during week 4 and 5 and possibly longer depending on the strain. Sativas usually tend to have a longer flowering cycle than do indicas. You still need some base nitro and higher phosphorus and potassium right up until you begin your flush. Most people recommend giving only water and no nutes 2 weeks prior to harvest. I used a compost soil this time with time released tomato fert thru veg and then added some bone meal during preflower and then started giving fox farms trio as bloom nutes during flowering. It was the granular fox farms trio though (open sesame, beastie bloomz, and cha ching) not the liquid. I have never used the liquid feeds either so I have no experience with those but I'm going to experiment next time. I'll post some pics here so you can see what I have so far.

Ok so I did some research on what you have used for your grow and I don't believe you under fed...nitrogen anyway. I think you would have been closer to over feeding than under. Did you mix your ffof and living soil right from the beginning or did you add your living soil as a top feed later on?? You definitely need some kind of bloom booster with very little to no nitrogen and higher in p and k. Also what kind of jobes spikes did you use? When I was looking those up I noticed there were several varieties.

From the start, Bottom 1/3 was super soil. Next 2/3 were 1/2 ffof amd espoma potting soil.

I never did a top dressing. I believe I used the tomato jobes.

dravenvlad said:

Ok so I did some research on what you have used for your grow and I don't believe you under fed...nitrogen anyway. I think you would have been closer to over feeding than under. Did you mix your ffof and living soil right from the beginning or did you add your living soil as a top feed later on?? You definitely need some kind of bloom booster with very little to no nitrogen and higher in p and k. Also what kind of jobes spikes did you use? When I was looking those up I noticed there were several varieties.

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