- Oct 15, 2017
- Reaction score
- mid-Michigan, USoA
I googled grill because I wasn't sure what that was exactly, and darn it, I got a small one of those for free at the grocery store this summer for a purchase up to a certain amount. I didn't keep it since I've never used one of those!So instead of using your indoor oven use your outdoor grill. But don't get it hot enough to burn up the organic materials in it, just hot enough to sterile it. The temperature I've seen recommended as a maximum is 180 F (82 C). They emphasize don't let it get hotter, bad chemical reactions can start. The minimum recommended temperature is 140 F (60 C).
I used the oven once, never used the grill. But if I were to sterilize soil I'd try the grill next time. If it were -16 C (3 F) I'd try to stay out of the wind while doing this. That wind chill could be unpleasant.
If you do it right you can turn anything organic into biochar in the process!If you wanted to sterilize soil for seed starting, you could probably do so - without the unpleasant indoor odor - by placing the soil in a used 55 gallon steel drum, and just leaving the drum in the sun over the summer. Provided the drum is a dark color, solar heating should get the soil hot enough. Alternatively, if you have a fire pit, you could probably get the drum hot enough there, while enjoying the bonfire.
That could be an interesting experiment... there is a place that sells used barrels & drums a few miles from me, so I may try that next year. Not that I intend to replace the starting mix that I use now, but it would be nice to have a backup plan if "supply chain issues" continue.