I rescued a mini Phal from Lowes back in Spring. When I repotted it, I decided to try the 50/50 bark/sphag mix for it. Not only did the mini Phal respond much better, but I liked how both the sphagnum moss and the bark mix worked well together. Up until then, all of my Phals were in only the bark mix. Which worked okay, but once Summer came around, they all needed to be watered on a daily basis because they dried out too fast. So I decided to repot all of my Phals into a 50/50 blend of the bark and moss. After doing so, all of my Phals responded much better to it and started growing at a much faster rate than before.
My brief experience with using the 50/50 blend has been nothing but a positive one. I find that you get the best of both mediums, the loose airiness of the bark mix and the great water retention of the sphagnum moss. I also noticed that the bark mix prevented the moss from becoming too compacted, even when I packed it in firm enough to hold the plants in place. Keeping the blend well aerated, while still allowing the roots to breathe without drying out too fast.
In the past, I've had relative success using both mediums on their own, but from now on, I definitely plan on using the 50/50 blend. Well, that's just my
. Of course everybody needs to find what works best in their growing conditions, but as for me I find that these two mediums seem to compliment each other beautifully. Keep us posted on this if you decide to give it a try. I would also love to hear from others and get their feedback on using a 50/50 bark/moss blend too.