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joefrank
Citruholic
Joined: 17 Oct 2007
Posts: 89
Location: Santa Fe, NM USA
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mgk65
Citruholic
Joined: 08 Feb 2010
Posts: 84
Location: WV (Zone 6)
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| Posted: Sat 22 May, 2010 1:44 pm |
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Of the 3, the one closest to the desired 5-1-3 ratio would be the Miracle Gro Miracacid.
Do a forum search for 25-5-15 and you will find a lot of message threads. |
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danero2004
Citruholic
Joined: 19 Jun 2009
Posts: 523
Location: Romania Zone 6a
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| Posted: Sat 22 May, 2010 6:59 pm |
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i have for now
10-52-10
10-30-20
30-10-10
and soon
20-5-30
so what if I make a mix of the last two of them , do i got the right citrus ratio
it would be 50-15-40 , am I right ?
what do you say |
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Sylvain
Site Admin
Joined: 16 Nov 2007
Posts: 790
Location: Bergerac, France.
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| Posted: Sat 22 May, 2010 7:31 pm |
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I am wandering about the 10-52-10 !
No. 30-10-10 and 20-5-30 mixed 50%/50% by weight will lend to a 25-7.5-20. |
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Ecomtl
Citruholic
Joined: 21 Mar 2006
Posts: 174
Location: Montréal, Québec, Canada
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| Posted: Sun 23 May, 2010 12:46 am |
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I'm new at translating what I'm learning in school to specifically citrus...but doesn't the proper fert depend on what you want to do?
Vegetative growth, root growth and flowering or hardening for winter and toughening up against pests are all different things you can promote with different formulas....
What do you want to do??
High N will encourage vegetative growth, not flowers and thus fruits
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danero2004
Citruholic
Joined: 19 Jun 2009
Posts: 523
Location: Romania Zone 6a
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| Posted: Sun 23 May, 2010 4:44 am |
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| Sylvain wrote: | I am wandering about the 10-52-10 !
No. 30-10-10 and 20-5-30 mixed 50%/50% by weight will lend to a 25-7.5-20. |
I never knew why when adding two component , your ratio is in half 
But after all it is good for the citrus ratio I guess? |
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danero2004
Citruholic
Joined: 19 Jun 2009
Posts: 523
Location: Romania Zone 6a
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| Posted: Sun 23 May, 2010 4:50 am |
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| Ecomtl wrote: |
High N will encourage vegetative growth, not flowers and thus fruits |
that's right but citrus are very heavy nitrogen feeder and indeed this is the reason to add a higher number in N in fertilizers , but also important is the last number K wich after what Peters Profesional say is a plant controller and also a bloom starter.
well in spring a 20-30-20 will also increase the chances that your tree will set fruit after a bloom booster is added. |
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Sylvain
Site Admin
Joined: 16 Nov 2007
Posts: 790
Location: Bergerac, France.
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| Posted: Sun 23 May, 2010 8:27 am |
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> I never knew why when adding two component , your ratio is in half
Because you double the weight.
For example you have two cups of coffee with one sugar in each.
you mix them in a mug. You still have one sugar per cup, not two. |
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danero2004
Citruholic
Joined: 19 Jun 2009
Posts: 523
Location: Romania Zone 6a
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| Posted: Sun 23 May, 2010 8:47 am |
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 ok , i didn't think of it this way  |
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Skeeter
Moderator
Joined: 23 Jul 2006
Posts: 2218
Location: Pensacola, FL zone 9
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| Posted: Sun 23 May, 2010 10:12 am |
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There are 2 reasons for not using more nutrients (in excess of 5-1-3) in containers. The excess can accumulate as salt and cause problems. In addition, excess P can bind minerals and make them unavailable.
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Millet
Citruholic
Joined: 13 Nov 2005
Posts: 6656
Location: Colorado
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| Posted: Sun 23 May, 2010 1:42 pm |
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Fertilizers such as Peter's 25-5-15 have a nutrient ratio of 5-1-3. The reason this ratio is important, is because 5-1-3 is generally the ratio that citrus roots take up nutrients from the soil, or from the container. Fertilization must respect this ratio when the mineral contents in the leaves are satisfactory. In other words, for every 5 parts of nitrogen a citrus tree absorbs, the tree will absorb only 1 part phosphorous, and 3 parts potassium. This is true no matter what fertilizer formula is being used. Therefore, when different formulas are use, such as 10-50-10 or 20-20-20, a citrus tree will still only take up 1 part phosphorous, 5 parts N and 3 parts K all the remaining nutrients build up in the container. - Millet (967-) |
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danero2004
Citruholic
Joined: 19 Jun 2009
Posts: 523
Location: Romania Zone 6a
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| Posted: Sun 23 May, 2010 2:47 pm |
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| Millet wrote: | | Fertilizers such as Peter's 25-5-15 have a nutrient ratio of 5-1-3. |
well , Peter's fertilizers don't have such a good ratio , instead i can make my own by mixing some of them so I guess 25-7,5-20 it would not be so bad |
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mgk65
Citruholic
Joined: 08 Feb 2010
Posts: 84
Location: WV (Zone 6)
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| Posted: Sun 23 May, 2010 3:23 pm |
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| danero2004 wrote: | | Peter's fertilizers don't have such a good ratio , |
As far as peters 25-5-15, it does have the ideal ratio, if you take each number and divide by 5, it gives 5-1-3. i.e. the RATIO is still good. |
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danero2004
Citruholic
Joined: 19 Jun 2009
Posts: 523
Location: Romania Zone 6a
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| Posted: Sun 23 May, 2010 4:07 pm |
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yes but i didn't find any peter's with that ratio , neither excel or pro or osmocote |
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Ecomtl
Citruholic
Joined: 21 Mar 2006
Posts: 174
Location: Montréal, Québec, Canada
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| Posted: Sun 23 May, 2010 6:16 pm |
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Why is it that the scott`s ferts I have for citrus and avocado is 13-7-13 then ??
I can`t quite understand why the absorption rates of the plant for the 3 major macros would always be in the same ratio year round. Surely there is some variation in the uptake ratio depnding on the time of year?
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