The tips of the leaves will discolour and break off along abscission lines if stressed by cold or prolonged drought, though overwatering will encourage fungal growth.
The two existing specimens were originally preserved in alcohol, but though this can discolour specimens, it is not probable that it could turn green to blue.
Once harvested, sprouts last three to five weeks under ideal near-freezing conditions before wilting and discolouring, and about half as long at refrigerator temperature.
