My pesticides have taken down to zero and never had anything go bad. When I worked for Texas A&M we stored hundreds of pesticides in unheated sheds where it was near zero every winter. No particular issues there either.

Do watch out for freezing sprayer equipment. Some equipment is hard to get all the water out of the pumps and so forth.

Thanks Fruitnut and HGF that info helps alot.
MD

Would probably make a difference if they were liquid or powder.

I have commercial pesticides that do have freeze warnings but it is the water soluble bags that are damaged by cold temps. Main thing is to keep things dry. If you had Imidan you'd need to keep that from freezing because it is sold in those bags.