Well-drained growing media (was Oh No! A Boophone disaster!)

Tim Harvey zigur@hotmail.com
Sun, 04 Oct 2009 12:00:40 PDT
Beware of yellow pumice! It can be the result of high levels of boron, which may be phytotoxic.



> In Washington state, Verkist orchid nursery outside Bellingham sells (or used 
> to sell) both washed and unwashed pumice, the former in your choice of sizes. 
> It's been many years since I was there, but the price was quite reasonable. The 
> pumice they sold was a warm ocher yellow, very attractive.

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