How do I stimulate den-phal spike?

[tanlu]

Hi all,

I've killed a den in the past so I've shyed away from them until now. I purchased two den-phals, one is a mini, that were out of bloom for $2 each last Friday. They are sitting by the bathroom window which gets southern and western sun all year. There's about 60% humidity all day, and the night temps drop to around 60-65F. Both still have their old flower spikes that are yellowing at the tips, but I'm wondering if it's possible for me to get them to send up another spike this winter? I heard they can send up spikes from old canes.

Should I cut the spikes down to where they meet the top of the cane? I've read from multiple online sources that den-phals can bloom year round, but I've also heard that dens generally only bloom once a year in spring.

What a confusing genus! Any help would be much appreciated!

Thanks!

Theo