P. oblongiloba help

[throckmoron]

Hello, I need info from anyone who grows this guy. The issue I need help with distinguishes this plant from any other I have seen. When I let my Mexican Ping's dry out for their winter growth, this one turned into a tight little onion shaped bulb with a brown paper sheath. I wetted the plants again almost a year ago and this one still maintains this form with no sign of opening or growing. It is definitely still alive, you can see green under the sheath. I have tried several different levels of wetness but cannot seem to kick this guy back into growth. Any suggestions? Should I bury the bulb?

 

[Joseph Clemens]

I've never grown this species myself. You should check with Fernando.

If you put it under strong fluorescent light with a long photoperiod, perhaps 14 hours/day. This might help kick-start it.