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Question for Al (tapla) re bark in gritty mix

12 years ago

I live in Australia and just starting to experiment with the "gritty mix" after being alerted to it by another Aussie pkozul.

Despite a lot of searching on the forum I can't determine if it is Ok to used aged/composted bark. Or does it have to be fresh bark? What about nitrogen draw down?

A more fundamental question- what is the purpose of bark in the mix?

I'm a grower of Amaryllid bulbs and Cycads

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