If you have lots of water, and can control their invasive habits, these three produce masses of biological material - especially the Water Hyacinth
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Jerry Coleby-Williams alerts gardeners to waterweeds - water hyacinth, water lettuce and salvinia – which are considered a major problem for North Australian waterways.
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Gardening Australia - Coming Up This Week 14/07/2007
(14/07 programme- notes not posted yet)
