I am making a substrate for germinating plants and they need the rice for its nutrient value. I messed up and let the pressure cooker cool down overnight and now I'm wondering if I should recook it... It has to remain perfectly sterile until I use it. What would happen if you pressure cooked --canned--someting twice? Any response appreciated.
Call around to local garden centers. Some of them should carry a wide range of planting mediums, including vermiculite.
If you have a Lowes or a Meijers near you, try them. I know both of them carry it here in KY
