We have been growing Cyperus papyrus for many years at Reading University and while the individual shoots grow tall the plants never seem very vigorous. The opportunity gained by digging the plant up and dividing it has allowed the option of trying differing watering regimes. So far the division that is growing best is in the deepest water tray and has sent up 8 new shoots.
The division growing in conditions most like those we have been using – damp but not wet soil – appears to have died. Trawling through the internet there seems to be strong consensus that water should be at or just above soil level for optimal growth. The post at Plantzafrica is pretty comprehensive and has some nice images of the species in cultivation.
What surprises me is that many sites report no pests or only a single rust species as a problem for papyrus yet I have known our specimens to become badly infested with mealy bug.
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