Leo in N E Illinois
The Professor
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Awesome, glad you swung by, this is what I rotate on all my conifers...except I usually omit the 2 acidic ferts for shimpaku...
often supplementing in ProTekt 0-0-3 with silicone to aid with transpiration, and Superthrive,(and K-L-N for newly potted)...
Miracle Gro or (generic 24-8-16)
MirAcid 30-10-10
Alaska fish fertilizer 5-1-1
Fish and Seaweed 2-3-1
Dyna Gro 7-9-5
Espoma Holly-Tone acidic 4-3-4
Plant Tone 5-3-3
Not in that order as I switch between using lower N during the hottest months
and every other week I use the higher N weather permitting.
I guess I need to rethink offering trees at all stages the same food though I really have nothing near finished
so I hope I'm not working against myself here too bad. Thing here to consider as well, this rotation applies
to my conifers and this is my 1st year getting back into maples.
When you say 12-1-4 is balanced to the needs of the tree, is that maples in general in an acid rain environment?
It looks like of all the foods I listed, the generic Miracle Gro is the closest is analysis doubling the concentration that I use.
Since Mothers Day is deemed our last frost chance, and the latest pre-emergence should be applied to the lawn
I figure the tree will be in green leaf and growing by then, why I suggested I'd begin feeding after frosts. Is that a fair assumption?
What I am trying to say, is that plants in general, all trees, orchids, and garden vegetables, year round consume nutrients in approximately the following ratio.
12-1-4
this 12-1-4 is the balanced formula trees NEED, not want, NEED.
if you complicate the idea with acid rain etc, the numbers would be different. But in a controlled environment, like what we provide for our bonsai, their metabolism consumes nutrients in this 12-1-4 ratio. The concentration will vary with the seasons, but not the ratio of relative concentration in use.
Any other formula is JUNK SCIENCE. see Michigan State University literature for references.
Any reference to high phosphorous fertilizer is jumping into a time machine, to 1880's London, and ignores the subsequent 140 years of agricultural and horticultural science.
The only reason there is a bonsai hobby at all anywhere in the world, given the poor formulation of most fertilizers used is that we water our trees frequently with water that no fertilizer has been added to. These flushings with clear water wash away the unnecessary excess nutrients, like phosphorous in the junk formulations from the 1880's. Trees generally are resilient, and will survive the mistreatment, if they are given sufficient ''plain water'', be it from hose, tap, municipal or well water or rain water to flush away the bulk of these poorly formulated fertilizers. A good rain storm will flush away a multitude of ''fertilizer sins''.
So throw away any fertilizer with more phosphorous than nitrogen. It can damage your trees if flushing is not adequate.