I have used coco coir - sold as cocogrow - as a mulch on my veggie garden. The tomotoes doubled in size in a week of applying it. Cocogrow is an organic product. It is processed 18 months vs the 6 months most companies do. There is no salt that I have witnessed. Since it is inert. It needs fertilizer added if it is to be used solely as a potting mix. I have not used it for any of my bulbs. I would think it would be best suited to those bulbs that require extra water, such as the riparian Hymenocallis, rain lilies, etc. Things that need a seasonal dry period might remain too wet. This is only a suggestion since I haven't tried it myself. I do know that it makes a great bedding for pets - such as turtles, reptiles, etc. Friends have used it and are very happy. John Ingram in Camarillo, CA, between Santa Barbara and L.A. http://www.floralarchitecture.com/ "Your Clivia Connection" New number >>> 805.914.9505 (cell, west coast time, please call accordingly. Thank you)