Heirloom strains of corn that have been selected, saved and passed down over thousands of years will be one of several examples addressed during the SFA Gardens’ seed-saving seminar and workshop, which is slated from 9 a.m. to noon Saturday, Aug. 6, at the Ina Brundrett Conservation Education Building in the SFA Pineywoods Native Plant Center, 2900 Raguet St.