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 Post subject: Slow Release Fertilisers
PostPosted: Wed Jul 03, 2013 10:52 pm 
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Joined: Wed Jul 25, 2012 8:57 am
Posts: 82
Location: Melbourne, Australia
Hi Folks,

I was wondering if anyone uses, and advocates, the use of slow release fertilisers incorporated within the potting mix or sitting on the surface of Phalaenopsis species? ones such as Osmocote etc - has anyone tried this with success?


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 Post subject: Re: Slow Release Fertilisers
PostPosted: Mon Jul 15, 2013 8:21 am 
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Joined: Wed Jul 25, 2012 8:57 am
Posts: 82
Location: Melbourne, Australia
No one?


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 Post subject: Re: Slow Release Fertilisers
PostPosted: Mon Jul 15, 2013 10:01 am 
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Joined: Wed Mar 09, 2005 12:40 am
Posts: 1579
Location: Texas
I used to use it for 1-2 seasons, but switched back to MSU/seaweed. I had a good, but limited experience with it, but have heard bad things about continued use, thus the reason for my switch.


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 Post subject: Re: Slow Release Fertilisers
PostPosted: Wed Jul 17, 2013 6:58 am 
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Joined: Fri Apr 29, 2011 9:37 am
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Location: Singapore
What are the bad things you heard ???

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Mervin Quah
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 Post subject: Re: Slow Release Fertilisers
PostPosted: Wed Jul 17, 2013 11:20 am 
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Joined: Fri May 11, 2007 7:37 pm
Posts: 2114
Location: Hampstead, MD USA
I haven't experienced this but I've heard they can release all at once


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 Post subject: Re: Slow Release Fertilisers
PostPosted: Fri Jul 19, 2013 7:51 am 
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Joined: Fri Sep 17, 2010 7:52 am
Posts: 313
Location: Oak Island, NC
Pretty much all "controlled release" fertilizers are actually "temperature release". Once water is allowed into the pellet, the fertilizer solution will come out through the microporous polymeric coating that covers it.

In addition to the fertilizer formula, the coatings are designed to release at specific rates at specific temperatures. Warmer=faster release, so if you choose the wrong one for your conditions, it is possible to overdose your plants.

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Ray Barkalow, Orchid Iconoclast
Using science & logic to improve orchid growing


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 Post subject: Re: Slow Release Fertilisers
PostPosted: Fri Jul 19, 2013 4:16 pm 
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Joined: Wed Jul 25, 2012 8:57 am
Posts: 82
Location: Melbourne, Australia
Thanks Ray for that info - much appreciated. Is there a slow release fertiliser designed for tropical orchids? I've started using a seaweed fertiliser to supplement the high nitrogen fertiliser I was using (17%) - this one has an N:P:K of 7.7:1.82:9.87 it's called Strike Back for Orchids. I've gotten some great growth with the other but now I'm hoping for some flowers...


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