I'm no expert Chris but this & the other ( I think I posted ) grow in 12mm bark in a clear pot, inside a normal black pot. No real reason other than it works. Many Phal' growers use the clear pots & spag moss but have much more suitable temps than me. If you have ideal, all year round conditions they'll grow as a mount on loose in a pot. I prefer the bark. Temps & light the same for this as everything else. 10c - 40c. 70% shade in summer, 15% in winter. Its about that as I use the Opal polycarb on the roof & walls.