Propagation can be done by means of seeds, stem-cuttings or division
and is vital to keep a stock plant in the garden. Plants tend to become straggly
and unproductive after repeated harvests. Because seeds are not readily
available, the most practical way is to stick a stem tip cutting into a pot of soil
obtained from the material bought from the market or taken from an established
plant. For each stem cutting, ensure there are several nodes to allow rooting.
Crowded, mature clumps can also be dug up, split and planted separately. Newly
propagated plants should be given shade and kept moist to take root and
recuperate.