It's aragonite - so it would be the same as adding limestone to one's mix - advisable in some cases, and not in others. As long as the salt is thoroughly leached from it, it would only be a problem for acid-loving plants. - Dave On Thu, Jul 7, 2011 at 5:09 AM, Fred Thorne <fsthorne@hawaii.rr.com> wrote: > Yes, but then my rain water is very acidic. Currently I add it to my > garden > pond to lower the PH. > > > -----Original Message----- > From: pbs-bounces@lists.ibiblio.org [mailto:pbs-bounces@lists.ibiblio.org] > On Behalf Of Peter Taggart. > Sent: Wednesday, July 06, 2011 10:34 PM > To: Pacific Bulb Society > Subject: Re: [pbs] Potting Mix > > Is coral sand alkaline? > > > On Thu, Jul 7, 2011 at 9:30 AM, Fred Thorne <fsthorne@hawaii.rr.com> > wrote: > > > Hi, > > > > > > > > Has any one used coral sand in their potting mix? Here in Hawaii I have > > two > > choices, either Basalt or Coral sand. > > > > > > > > Regards, > > > > Fred in Pahoa, Hawaii > > > > Zone 10 -11, with 180 inches of rain > > > > _______________________________________________ > > pbs mailing list > > pbs@lists.ibiblio.org > > http://pacificbulbsociety.org/list.php > > http://pacificbulbsociety.org/pbswiki/ > > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ >