Soil is a general term which refers to the earth that plants grow in. This category lists sites providing information and advice to home gardeners on the topics of soil, potting mixtures, and additives.
Explains how iron deficiency affects trees and plants, with links to more detailed information.
Series of projects, articles, and tips on fertilizing, composting, and nutrient management.
Covers a wide range of garden soil topics, including soil types, pH, nutrients, testing, composting and fertilizers.
Oregon horticulturalist offers information on soil components, pH, testing methods, and nutrients, and means of improving it by using amendments and improving drainage and aeration.
Collection of articles and resources about the horticultural uses of perlite and vermiculite.
One-page site giving suggestions on where to purchase vermiculite in the United States, along with some uses and properties of vermiculite.
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