In article
,
Frank wrote:

On May 9, 3:45*pm, Billy wrote:

Do you understand now Dave? Dolomite lime is inorganic (in the language
of Chemistry) but is organic in the language of gardening. The sins of
potassium sulfate and superphosphate lie in their production and not in
their nature (unlikely to contaminate crops, or deform fetuses), and
they could be replaced with rock phosphate and potassium ash (wood ash)
in the recipes.

Whereas, the latter two sources are slower release sources
(IIRC), and therefore more useful for building soil fertility in
the ground, rather than in containers. Organic offers
other ways to boost phosphorus, such as encouraging
symbiotic bugs and fungii to process and make available
what little phosphorus already exists.

Rock phosphate certainly is slow release but I have conflicting
information on bone meal. One source says that it is only available at a
pH of 5.8 to 6.2, and the other says from 6.5 to 7.5. Two other choices
would be banana peels, and cottonseed meal. Should be quick release as
would wood ash for potassium, since it is in the form of potassium
carbonate (about 2 - 3%, IIRC).
--

- Billy
"For the first time in the history of the world, every human being
is now subjected to contact with dangerous chemicals, from the
moment of conception until death." - Rachel Carson

http://www.youtube.com/watch?v=WI29wVQN8Go

http://www.haaretz.com/hasen/spages/1072040.html