My thought would be - definitely not enough light in the office.You need to keep it 12 inches from fluorescent lights in your office - and it doesn't seem practical. Do you have an adequate drainage and loose enough soil? It seems to me that your decorative box cuts even more light and even your porch may be was too dark. How about placing it on your windowsill at home as long as it is not south or south west?

Temperature wise - I do not know - let's wait when somebody will consult you about the upper recommended temperature for gloxinias. Streptocarpus would be long dead.

Good luck.

Irina

Looking at the photo, I wish you had taken the picture without the box hiding the pot and stem. It looks pale and a bit weathered but otherwise quite healthy. See my other post on the houseplant forum. Grow it in a bright window sill. A south window would probably be OK, as long as you don't let the plant dry out. If it doesn't flower on this growth cycle, don't give up. They die down to their tubers after a while and will then resprout with a new stem and a new chance to set buds, make great leaves, and flower for many weeks. The correct name is Sinningia speciosa. A glox can be quite long lived if taken good care of and with luck.

Jon