Bruce W.1 wrote:
Doug Kanter wrote:


Without a soil analysis, "rich and fertile" don't mean much. But,
even if the nutrient balance was perfect for a given plant, you'd
still need to continue adding to the soil over a period of time.
This could mean adding compost, or mulches which contribute
nutrients as they decompose. The soil is not a static environment.


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Fair enough. Then maybe a better question would be how long does it
take a plant to deplete the nutrients in the soil?

Take for instance some fast growing house plant, in a pot, and with
new potting soil. This plant gets plenty of sun. How long before
it needs fertilizer? Without specifics and details it's probably
difficult to say. But in general, how long before the soil needs
fertilizer? Weeks, months, years?

Thanks.

Commercial potting soil probably has zero nutrients.

--

Travis in Shoreline (just North of Seattle) Washington
USDA Zone 8
Sunset Zone 5