You probably garden with terra cotta pots, as they're economical ... All you need is an old terra cotta plant saucer and some chia (Salvia hispanica) to grow your own beneficial microgreens.

Photo: Pim van Huisseling A mention in the Guardian of ‘one potter called John’ who spent a muddy hour digging for ‘2.5 million-year-old clay ... a centre for pottery and ceramics since Roman times.

Terra-cotta pots are a longtime favorite of gardeners and growers because they regulate moisture and permit air circulation around plant roots, preventing root rot. Heavy clay pots act as insulation ...