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Tips:5¢ Advice:Free
Join Date: Aug-2001
Location: Silicon Valley
Country: USA
Posts: 9,745
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I think it depends on the quality of your soil and what you're trying to grow. Soil is clay-heavy here in my corner of Northern California, which works fine for elm, pomegranate and crabapple (as well as a lot of fruit trees and shrubs) It doesn't work very well for pines or juniper unless you adapt your watering quite a bit, and if the trees are in the same bed, that would be impossible. So for that I have to amend the soil to improve its drainage. Usually an elevated bed in that case.
Hope it helps, but you're asking a very broad question. I know in Nipomo, CA, they have a very sandy soil in which they grow Japanese Black Pine and don't amend it much at all. When I asked the guy said they didn't even fertilize. I stopped by once when the neighbor's septic tank was overflowing, so maybe they do have a fertilizer secret there.
Regards,
Matt
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