Laelia gouldiana spike

I bought this a few years ago - close relative of Laelia anceps.  It wasn't doing well in a pot - I moved it to a mount and wrapped the mount with some sphagnum.  It has been doing better but still is growing only from one lead.  Last year's growth started a spike (which you can see) but it never elongated and did not flower.  This year's growth also has a spike and it looks like it may flower.