Plant deficiency?

I accidentally posted in outdoor growing. But just needed some advice on this liberty haze I'm growing. I'm no expert but have a pretty good foundation from the years of growing. Never really had this issue. Soil is local+compost+worm castings, so I am assuming it's not nitrogen. One of the more fickle strains I have grown for sure. Been using seasole or kelp solution for food. But looking for something else as that's all I've really used while vegging. Any advice on nutrients would be greatly appreciated. Thanks in advance

yellowing from the bottom up is usually nitrogen deficiency BUT you also have burnt tips which indicates a burn. could it be a lockout due to too much of something?

Thanks for the reply. I've only fed this plant twice with kelp and that is all. It's kinda why I am bewildered as to what it could be. I have a bag of dolmite lime that I could try but I don't want to screw around with the PH.

hazes are notoriously sensitive to nutes as well. been there done that. wish i could help more

Well the unusual yellowing of plant leaves called chlorosis and this is because of lack essential pigment in the chlorophyll, this is generally caused because of deficiency in plant leaves or exposure to too much or lessen sunlight. you must check your health first as it may be over watered or tightly packed which results in less air availability to the plant roots and they dried up or start yellowing. For reference you can visit you nearby marijuana dispensaries for the knowledge.

picture perfect mg deficiency. just get some Epsom salt from your nearby grocery store. I can't remember the dosing for that sort of application, I'm sure the google machine does. @John Levy was pretty close, interveinial chlorosis is tell tale mg deficiency. Maybe just get some cal mag, unless you're using tap water in which case get the Epsom salt.

If you treat it soon some of the leafs might recover. I had a mg issue that fully healed one time.

dtl420 said:

picture perfect mg deficiency. just get some Epsom salt from your nearby grocery store. I can't remember the dosing for that sort of application, I'm sure the google machine does. @John Levy was pretty close, interveinial chlorosis is tell tale mg deficiency. Maybe just get some cal mag, unless you're using tap water in which case get the Epsom salt.

If you treat it soon some of the leafs might recover. I had a mg issue that fully healed one time.

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Thanks for the advice man! I had a little feeling it was magnesium. I have a bag of dolmite lime which says on the bag it's a good source of calcium and mg. Do you reckon it could be good to use instead of Epsom salt? I'll probably grab some anyway.
Cheers.

Ye

John Levy said:

Well the unusual yellowing of plant leaves called chlorosis and this is because of lack essential pigment in the chlorophyll, this is generally caused because of deficiency in plant leaves or exposure to too much or lessen sunlight. you must check your health first as it may be over watered or tightly packed which results in less air availability to the plant roots and they dried up or start yellowing. For reference you can visit you nearby marijuana dispensaries for the knowledge.

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Thanks mate
Yeah I don't over water her, but the soil may be a little compacted but I've never really had any issues with the soil density as I found the roots will go through clay if it's soft enough.

aussiegrowing said:

Thanks for the advice man! I had a little feeling it was magnesium. I have a bag of dolmite lime which says on the bag it's a good source of calcium and mg. Do you reckon it could be good to use instead of Epsom salt? I'll probably grab some anyway.
Cheers.

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I would use the Epsom salt. Lime is something that has to be worked into the soil and break down to become available. Maybe not a horrible idea to work a little into the top few inches of the soil to give her a source for later, just make sure not to disturb the roots too much. But at this point it'll probably be more effective to just put about a tablespoon or so in a gallon of water every week or 2. Epsom salt is 100% water soluble magnesium sulfate, so too much or too often will cause issues.

Here are a couple of charts. I suggest saving them to a file or on you phone for later reference if you don't already have them. These charts are true for all plants, not just cannabis. The nutrient ions react with the pH of a solution, solubility in water changes at different pH levels. With the top chart you'll notice why we say plants grow best in a given pH range.

In the second chart you'll notice that too much magnesium will increase the solubility of phosphorus and boron, while decreasing the solubility of calcium and potassium. Mulder's chart depicts the strength of the bond of each ion. Some, like calcium, have a very strong bond. Aluminum, which is not depicted on the chart, but is still considered a micro nutrient for plant growth, has the strongest bond of all the ions if my memory serves me.

Also, check out the cation exchange capacity (CEC) of different soil particles if you haven't already. This relates to the second chart, and explains how each soil particle, whether negatively or positively charged, act as a magnet holding onto nutrient ions of the opposite charge.

Thanks for the info mate.
Is it possible that the soil may be to acidic and has locked out magnesium? I'm just paranoid about adding mg if the deficiency is due to PH. If that's the case the plant may not even process the mg. I've added dolmite mix into a bucket of water as I did this with my tomatoes and fixed the blossom end rot straight away. If i correct the PH with dolmite and add the mg do you think it may be safer? Excuse the questions I've never really encounter this issue before haha

You got the best advice above. most certainly an issue with magnesium! So it has to be determined..is it there and plant is not getting it? Or is it lacking altogether. The reference posted above is exactly what should get you on the right track! It is most likely not a ph issue as you'd also see other problems. As mentioned, uptake of magnesium is negatively affected by too much potassium, phosphorus, or calcium in most cases, or lack of phosphorus as they are dependent on each other for transfer. Those burnt tips can be a number of things, again..too much p or k would cause that..as well as a cal/mag deficiency which may be the case. Those tips also come from too much, or not enough sulfur, both will burn the tips like that. New growth also looks quite skinny, which again is a staple if there is too much p or k sitting in your medium. Epsom salt would be the place to start.

aussiegrowing said:

Thanks for the info mate.
Is it possible that the soil may be to acidic and has locked out magnesium? I'm just paranoid about adding mg if the deficiency is due to PH. If that's the case the plant may not even process the mg. I've added dolmite mix into a bucket of water as I did this with my tomatoes and fixed the blossom end rot straight away. If i correct the PH with dolmite and add the mg do you think it may be safer? Excuse the questions I've never really encounter this issue before haha

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Blossom end rot is caused by lack of calcium..dolomite lime is more calcium than magnesium..which if there is already too much of, may lock out magnesium. its hard to know what's in there as you say its 'local' soil..what is it made up of? Also what do you use as a watering source? What's in that?

aussiegrowing said:

Thanks for the info mate.
Is it possible that the soil may be to acidic and has locked out magnesium? I'm just paranoid about adding mg if the deficiency is due to PH. If that's the case the plant may not even process the mg. I've added dolmite mix into a bucket of water as I did this with my tomatoes and fixed the blossom end rot straight away. If i correct the PH with dolmite and add the mg do you think it may be safer? Excuse the questions I've never really encounter this issue before haha

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More often than not you see issues with calcium and phosphorus arise due to low soil ph. I'd say that the safest bet is Epsom salt for now. Next time you water give it a lean tablespoon of Epsom salt in a gallon of water (sorry, I don't know metric). Then keep an eye on it for a few days and see if it improves. If you're into foliar sprays, it absorbs quickly into the leafs but mix it around 1 teaspoon per gal. I would continue feeding it with a light dose of Epsom salt afterwards, supposing it works.

Have you given it anything other than water?

dtl420 said:

More often than not you see issues with calcium and phosphorus arise due to low soil ph. I'd say that the safest bet is Epsom salt for now. Next time you water give it a lean tablespoon of Epsom salt in a gallon of water (sorry, I don't know metric). Then keep an eye on it for a few days and see if it improves. If you're into foliar sprays, it absorbs quickly into the leafs but mix it around 1 teaspoon per gal. I would continue feeding it with a light dose of Epsom salt afterwards, supposing it works.

Have you given it anything other than water?

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No worries, grabbed some Epsom salt and did what you said and gave her a feed with that. I've only fed the plant twice with seaweed solution I've been a little hasty this year and I guess this is what happens with little prep. I need to go grab her an all rounder for nutrients id say. I honestly thought the soil mix I made up would have kept her healthy but you live and learn I
guess!

Y

Blitz35 said:

Blossom end rot is caused by lack of calcium..dolomite lime is more calcium than magnesium..which if there is already too much of, may lock out magnesium. its hard to know what's in there as you say its 'local' soil..what is it made up of? Also what do you use as a watering source? What's in that?

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The local soil around here is mostly volcanic hence which is why I added some to my soil mix as I have all my veggies growing mad and I haven't done a thing to the soil for the rest of stuff I've grown, but I added in my own worm castings and compost that I bought. I figured that would keep her pretty good until the plant established itself. But I guess I was a little hasty this year. Usually I prepare the soil with chicken shit or cow shit, I completely forgot to add it in typical stoner Mistake!

aussiegrowing said:

No worries, grabbed some Epsom salt and did what you said and gave her a feed with that. I've only fed the plant twice with seaweed solution I've been a little hasty this year and I guess this is what happens with little prep. I need to go grab her an all rounder for nutrients id say. I honestly thought the soil mix I made up would have kept her healthy but you live and learn I
guess!

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If you want to stick to the all natural/organic there are a lot of things you can use. Liquid kelp/seaweed, fish emulsion, and high phosphorus guano are a good trio packed with lots of micro and macro nutrients. That's 3 I use a decent amount of in my organic pot. Look into making your own organic fertilizers and compost teas, you don't have to go to chemical nutrients unless you want to. It's also good to have some more amendments that you can mix into your soil. Check out subcool's super soil in the organics section if you haven't already. That's the first place I started when I started growing. It's good for both beginner and advanced gardeners.

if you're putting it in at 6.8, the plant ought to be able to get what it needs out of it. looks like a mag issue to me, what's the drainage like?
maybe a little green sand or perlite added to the mix?

just an update, seems as if the plant has bounced back? Cheers for the help!

Love the follow up pics! Glad we could help! Keep an eye out though, looks like something is munching on your leafs.

yup, i'd get some spinosad right now and spray the shit out of that plant. it looks good, but if you don't slow down the (probably) mites, it won't for long