True, if the jar seals very well and you use more than a tablespoon or two of silica gel, don't check the humidity and leave them there for more than a week or two, you could go below 10% and that isn't good for seeds.
Thanks for bringing that up!
None of my large tubs seal that well. My problem is replacing small desiccant pkts often enough to keep them dry.
I also worry about drying "green" seeds too fast. If the seed is not entirely ripe before drying it below 30% eRH, I assume that would be a problem. Maybe letting it dry slowly also let's unripe seeds "go to sleep" before the dryness stops the ripening.
My perspective is mostly on what to do with literally soggy seed heads. Press them between paper towels surrounded by cotton towels, then ... hope they dry below 50% eRH before they turn visibly moldy. I've given up on soggy seed heads, because even after drying, I don't want to carry mold spores into my seed jars.
Seeds that must be used "fresh" may not tolerate drying at all. But they are relatively rare seeds.
