gtarman Posted December 16, 2013 Hey all. So I've heard talk that there's (at least) two kinds of nitrogen compounds you can get from different fertilizers - one being ammonia and the other being nitrates I think? Sorry if that's wrong and/or stupid sounding, I'm a bit of an ignoramus when it comes to anything chemistry-related. But I heard that some plants love the ammonia form, and some are quite sensitive to it and don't handle it very well. I tried finding out more from Google but couldn't seem to find a decent source of info on it. So does anybody know which fertilizers contain which type, and when you might use one and not the other? At the moment I just use fish emulsion for pretty much all my plants. Cheers Gman Share this post Link to post Share on other sites
Leaves Posted December 17, 2013 This says stuff about pros/cons http://extension.psu.edu/agronomy-guide/cm/tables/table-1-2-11 Share this post Link to post Share on other sites
waterboy 2.0 Posted February 7, 2014 ammonium based ferts can be a problem more so under cooler conditions...its a no-no for me for most of the year http://www.greenhouse.cornell.edu/crops/factsheets/AmmoniumToxicity.pdf Share this post Link to post Share on other sites
