Arnold Sorry for the confusion over names. Chemicals are a bit like plants, there is the formula K2SO4, the normal (English) chemists name, potassium sulphate, an older version, sulphate of potash, and an even older, muriate of potash. Traditional gardeners and agriculturists might use either of the two latter names, but as an analytical chemist by training I can only think in terms of the first name. If someone asked me for muriatic acid I would have to get a dictionary out, to find it was sulphuric acid. And then if you travel and have to use another language you sometimes find the translation better fits what you thought of as the trivial name in English. Using the wrong plant in the garden can be annoying, using the wrong chemical in industry can be dangerous. Alberto I can see there is no point in using analytical grades of potassium sulphate on the grounds of economics, but cannot see your reasoning as regards impurities (added elements?) in agricultural/horticultural grades of potassium sulphate. The SRGC is referring to 0:0:50 inorganic powder or crystals with nothing else added, as a bulb "booster". Brian Whyer, Buckinghamshire, England, zone ~8 > -----Original Message----- > From: pbs-bounces@lists.ibiblio.org [mailto:pbs-bounces@lists.ibiblio.org] On > Behalf Of Alberto Castillo > Sent: 07 November 2005 13:43 > To: pbs@lists.ibiblio.org > Subject: Re: [pbs] Nerine sarniensis > > > > > >From: arnold trachtenberg <arnold@nj.rr.com> > >Reply-To: Pacific Bulb Society <pbs@lists.ibiblio.org> > >To: Pacific Bulb Society <pbs@lists.ibiblio.org> > >Subject: Re: [pbs] Nerine sarniensis > >Date: Mon, 07 Nov 2005 07:56:13 -0500 > > > >Brian; > > > >I had seen the SRGS Bulb Log and tried to find the sulfate of potash > >product. All I was able to find was muriate of potash after an > >extensive search. Anyone out there in the US know of a source please > >forward it long to me. > > > >Arnold > > > Hi Arnold. > Muriate of potash and potassium sulphate are the same thing. > More important, there are two kinds (and prices), one "pure for analysis", > that is for laboratories that has no added elements, very expensive and > useless for our gardening purposes and the other that contains traces of > other elements and is cheaper and perfectly suitable for feeding bulbs and > fruit plants. > > Regards > Alberto