here's a good page, with almost everything one would want to know about saltpeter (KNO3). http://www.salt.org.il/saltpet.html or, for that matter, about salt itself .... interesting site http://www.salt.org.il/frame_mission.html and another, that recommends saltpeter for growing peppers, http://www.batnet.com/rwc-seed/Pepper.growing.tips.html this quote, regarding hydroponics ... "In vitro experiments were undertaken to investigate whether the potassium or the chloride ion was the most active against S. tritici mycelial growth and spore germination. Potassium chloride, sodium chloride and potassium nitrate were used. All three salts significantly reduced mycelial growth and spore germination." is from the page http://www.bspp.org.uk/meetings/dec97abs.htm nonetheless, my suspicion is that, nitre is effective in reducing dormancy in the seed & encouraging early growth. bacteriostatic , yes. but not particularily effective as an anti-fungal. however, i will defer to those with far more growing experience than my meagre efforts ! regards peter g ------------------------ <I don't know the effect of KNO3 on fungi and spores but I would doubt that it would be effective. Regards, Cameron.>