Thank you Jane. On 3/07/2013 8:51 a.m., Jane McGary wrote: > I have always preferred unwashed pumice with fines for my bulb and > alpine mixes. In addition to retaining moisture, the fines also > release a significant amount of nutrient and help to balance the pH > of what would otherwise be a pretty acidic soil, given what is > available to us here. > > Washed pumice is also available here but it's mostly used in > bark-based coarse potting mixes for growing conifers and other woody plants. > > Jane McGary > Portland, Oregon > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > -- Ina Crossley Auckland New Zealand zone 10a