True but using uncomposted bark lasts longer. We usually give more than enough N to our trees to compensate for nitrogen draw down. Orchiata is probably the best as it has been aged but NOT composted with N which tends to destroy the structure. Orchid growers have had extremely good results with it and no great N issues. Kiwi bark is similar to orchiata but raw and unmodified with dolomite. It should be ideal for pines and probably other conifers and acid loving trees as well.dansai wrote:I used to use Ausgro pine nuggets by Biogrow for my orchids. A good composted pine bark graded into many sizes. It is important to use composted pine nuggets as uncomposted will repel moisture if it ever dries out and will use up all available nitrogen in a mix as it composts.
I got mine from Floyds Orchids in Wahronga. I don't know if he still operates but you might find other suppliers in the Sydney area.
Many of the cheaper composted barks don't last very long and can turn to mush in a year or two so you must compensate by adding more gravel etc.
But if I had the choice and the money I would use orchiata every time (especially for pine).
