Abstract
Five ornamental species grew as well in media that included composted bagasse as those grown in peat moss or pine bark. Plants of most of the species grown in a potting mix which included fresh bagasse grew at reduced rates and the medium shrank excessively. For some species, a medium containing both bark and bagasse may increase production compared with media containing either bark or bagasse alone. Boron (0.1 g l −1) applied at fortnightly intervals reduced dry matter production in all species. Media mixed in a commercial mixer (5 m 3) had similar effects on plant dry weight to those mixed with a small mixer (0.05 m 3). African violets ( Saintpaulia sp.) grew well in a range of media, but produced greater root dry matter in a mix containing a high proportion of composed bagasse.
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