Hi Guys! I'm wondering what you guys use to fertilize your Hippeastrum and other Amaryllids? I use a fertilizer that's nitrogen is primarily sourced from Nitrate Nitrogen and a small percentage from Ammoniacal Nitrogen, does anyone have any suggestions? I think the breakdown is 7-8-6. My Hippeastrum seem to really like it, I feed at 1/4 strength with every watering. Josh Anderson, IN