Bottom line: Mushrooms you cultivate yourself follow the same farm exemption as other fresh produce — mushrooms you forage in the wild are a liability risk this guide can't make safe, permit or no permit.
The Path
Cultivated mushrooms sold fresh and whole — oyster, shiitake, lion's mane grown by the seller — are generally treated like other fresh produce, so the same farm exemption that covers Fruits and Vegetables applies. Dried mushrooms or mushroom powder from cultivated species can be cottage food eligible as a dried good. Wild-foraged mushrooms are a different matter entirely: Florida has no state mushroom-identification certification program, and misidentification carries a real poisoning risk that no amount of paperwork resolves — this is a case where the safest business decision is simply not to sell foraged product.
What You Need
Sell only species you cultivate yourself, sold fresh and whole
Dried cultivated mushrooms/powder: standard cottage food label
Grower name & address, species/variety, and storage instructions on the label
Watch Out For
Do not sell wild-foraged mushrooms — no certification program exists to make this safe, and misidentification risk is real