William Curtis, The Botanical Magazine — 47
“ It is propagated by offsets, which may be taken off every year; the best time to shift and part these roots is in August, that they may take good root before winter; in doing of this, there should be care taken not to break off the fibres from their roots. They should be planted in pots of a middling size, filled with light kitchen-garden earth; and, if they are kept in a moderate degree of warmth, they will produce their flowers in plenty, and the roots will make great increase. ”
