But the thousands who regularly sell their home-made jam, marmalade or chutney in re-used jars may have to abandon their traditions after a warning that they are breaching European health and safety regulations.

FORBES: Now The European Union Starts To Ban Recycling

Or apple geranium leaves into any jam, jelly or marmalade except those made from quinces.

FORBES: Now The European Union Starts To Ban Recycling

While her Chez Pim bergamot marmalade is already sold out for the season, fellow Bay Area jam makers June Taylor (junetaylorjams.com) and Rachel Saunders (bluechairfruit.com) have preserved the citrus of the moment in limited batches that are still available for purchase and certainly live up to Ms. Techamuanvivit's promise.

WSJ: Bergamot Is No Lemon

Blogger and jam maker Pim Techamuanvivit goes to the latter for her bergamots, and she turns them into marmalade.

WSJ: Bergamot Is No Lemon