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PostPosted: Feb 6th, '14, 13:49 
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Signs of Potassium deficiency:

- yellowing leaves between the veins (look at Ronbo's first photo)

- tissue death/burn around the edges of leaf

- older growth shows it first

- poor fruit growth

Nate recommends supplementing Pottasium with:

Kelp for slow effect (NPK 0-0-10)

Potassium Sulphate (NPK 0-0-50) for fast effect

Potassium Chloride (as a foliar spray only)


ps Stuart, it's probably a bit vain to quote myself :wave1:, but this comment:

jono81 wrote:
Potassium deficiency with fruiting plants is pretty common in AP


.. was primarily directed towards Ronbo, not your issue


Last edited by jono81 on Feb 6th, '14, 14:06, edited 1 time in total.

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PostPosted: Feb 6th, '14, 14:02 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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Yeah very common but for some reason it is often a "new system" problem.

After a couple of years some people have found that they didn't need to continue to add K.


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PostPosted: Feb 6th, '14, 14:08 
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Why do you think this is though?

It does indeed seem to be the trend.


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PostPosted: Feb 6th, '14, 14:49 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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I don't know (obviously) but I suspect that the mineralisation process takes time. After a month of so a lot of nutrients seem to be released into the water and hence available to the plants. Maybe it takes longer for some of the proteins/chemicals that contain the majority of the K to break down so it is available :dontknow:


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PostPosted: Feb 6th, '14, 14:50 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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Oh and I can't find Nate's 4th video on potassium :cry:


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PostPosted: Feb 6th, '14, 18:35 
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Yeah I reckon you're right regarding the mineralisation process.. I look forward to learning more about this as new research emerges in future as there still is a certain element of mystery about it, without a doubt

until then I'll keep adding those mighty red tiger worms ;)

oh and here is Nate's 4th vid where he talks about what they use to supplement potassium:

https://www.youtube.com/watch?v=Cgu7uOWTbJw


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PostPosted: Feb 11th, '14, 15:27 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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This is a good problem to have.

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This tom and the one next to it are almost to the wire. I know the theory is that you can then lower them but...

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The tomatoes are not yet ripe and won't be for some time.

Thoughts?


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PostPosted: Feb 18th, '14, 08:21 
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Thanks for the input.

Is there a natural source for the needed potassium? Please advise as to my options and applications. I only have my plants and gold fish to be concerned with. And I plan to replace the gold fish soon anyway. Ronbo


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PostPosted: Feb 18th, '14, 08:31 
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Burry a washed banana peel in your bed, otherwise grab some EcoRose or EcoFungicide (potassium bio carbonate), these last two will also buffer your ph way up... So only require small amount.


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PostPosted: Feb 18th, '14, 15:33 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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I think I have a number of problems with my Toms.

Last week was the second of two really hot spells hence you will see many of the leaves have rolled up in response. In addition to that I've got at least two more issues.

The first is the older leaves dyeing off.

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PostPosted: Feb 18th, '14, 15:34 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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More of the same.

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PostPosted: Feb 18th, '14, 15:37 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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The second problem is a moldy growth.

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So in short HELP.

Don't know plants nearly as well as I know fluid dynamics.


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PostPosted: Feb 18th, '14, 16:19 
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I found these sites scratching around researching the "Iron" supplements pretty handy as the pics are on tomato leaves covers most elements .

I believe if the plant suffers from the top down its nutrient and from the bottom up its disease / pest .

Looks like powdery on top of something else .

Have you had any corn in lately they are good indicators

http://5e.plantphys.net/article.php?id=289

http://www.hydroponicsequipment.co/solu ... eficiency/


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PostPosted: Feb 18th, '14, 16:23 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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A number of nutrients are mobile within plants. For example K and Mg can be liberated from old leaves and used to support new growth.

So your generalisation from what I've read it would seem to not be the case :dontknow:


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PostPosted: Feb 20th, '14, 16:34 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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Wanted to bump this because I haven't had many replies.

Mold seems to be spreading. I'd use the search engine but it seems to still not be working.


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