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Abstract
Chrysanthemum morifolium Ramat cv. White Spider CF2275 plants were grown in soilless media comprised of an andesitic cinder and pumice inorganic component mixed in 4 ratios with 4 organic components, namely, sphagnum peat, aged wood shavings, aged pineapple waste, and ground tree fern trunks (hapuu). The plant responses in the different media showed little difference from those in the control medium of equal parts of soil, peat, and perlite. Mixtures containing from 33 to 50% organic matter were satisfactory for plant growth. The physical and chemical characteristics of the media were within the ranges defined as satisfactory by previous researchers.
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HortScience