Copper and your orchids

[Undergrounder]

ah thankyou everyone, such great posts... orchids3 that is very interesting and i guess is why camille's bordeux mix has lime in it! im trialling a method of growing Phal seedlings that uses 100% humidity to minimise watering and have been thinking about cheap methods to systemically combat the increased mould risk that might occur, so if i do add copper to the mix that's very good information to know, thankyou.