Liming materials and rates for Boston ferns in a soilless medium: I. Effect of pH

Abstract
The growth of Nephrolepis exaltata (L.) Schott Compacta was compared for plants growing in a peat-perlite medium limed at 3 rates using 2 liming materials, dolomitic limestone and hydrated lime. Greatest fern growth occurred with no lime or low lime treatments. Both liming materials produced rapid changes in pH, which remained relatively consistent for 16 wk. Two procedures were used to monitor pH; a standard soil testing procedure and effluent analysis. The pH ranges resulting in the greatest growth were 3.8-5.1 for media pH values and 3.6-5.5 for effluent pH values.

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