Mounting on Pine?

[NiNiDazzle]

I have two orchids mounted on pine planks. They have been on there for about 3 months now and I already need to remount. It's a soft wood and with daily 20 second dunkings, the wood has split. I'm waiting on some tree fern planks to come in before I remount.

I grow indoors under lights and I guess the soft wood could not hold up with being moist, then super dry, then moist, then super dry...