Gloxinia flowers

Question

Do I cut the stem after they bloom or just leave it to deteriorate?

Answer 1

If you remove the first couple flowers of the season, this will encourage new growth. After these first flowers, however, you can just leave them, watering the foliage until it fades. This article goes into more detail:
http://www.clemson.edu/extension/hgic/plants/indoor/flowering/hgic1559.html