I just cut the scape off below the prolif before the scape begins to turn brown, and plant them without trying to root them in water.
I will often just push them into the soil at the base of the parent plant so I don't need to get a pot and mark a tag. For some reason
first year seedlings will produce prolifs much better than in following years. Some plants like Joan Senior will have many every
year, where others never produce a prolif.
