Det ser desværre ikke ud til, at der er nogen med erfaring?
Jeg fandt en engelsksproget hjemmeside der bekræftede de ting jeg havde hørt. Andemad (duckweed) vokser så hurtigt, at en plante kunne dække hele jorden på fire måneder, hvis planten ikke blev spist eller stoppet af søbred osv.:
"Duckweed have the highest growth rate of any higher plant. In ideal conditions (high levels of nitrates and phosphates), the surface area covered by duckweed can double in less than 2 days. The Indian species, Wolffia microscopica, can bud off a new daughter every 30-36 hours. Thus one tiny plant could, theoretically, in four months produce offspring equal to the volume of the earth!"
Hele planten kan spises, der skal kun bruges et meget lille areal og der er et meget højt indhold af protein osv. Mennesker spiser det åbenbart også i Thailand:
"Uses as food: Because Duckweed floats and require little structural fibres (5-15%), it has more nutrition by weight compared to other vascular plants: protein (15-25% in natural conditions, 15-45% when cultured under ideal conditions), fat, nitrogen, and phosphorus. It also contains higher amounts of essential amino acids than most plants. In fact, it most closely resembles animal proteins. It also contains large concentrations of trace minerals that make Duckweed good supplements for animal feed. In addition, they are easily cultivated on small strips of wasteland and easily harvested. In fact, Duckweed is eaten by people in Thailand. There are also projects to look into the cultivation of Duckweed as feed for fish (carp), poultry (chickens, ducks), livestock (pigs). Duckweed is also an effective "crop". For the same amount of nutrients, Duckweed grows on 10% the area needed for soyabeans, and 20% that of corn. Because it has such low fibre, the whole plant can be used, unlike other crops where only a small part of the plant can be eaten."