I totally want to buy some hornbeam seeds from sheffields,but it states crop year at 2010?
Is it possible for coreana hornbeam seeds to store that long?
I did reach out to him to hear what he has to say,but we keep playing phone tag .
Yes, if kept frozen they should stay viable for close to 20 years. Maybe more.
My oldest seeds are close to 15 years old, kept at -20°C and they still germinate as they did in 2014.
These are perennials, the plants are not even frost resistant.
Most trees that undergo winters and droughts (desert species) produce seeds that can be stored for decades as long as they're kept dry and frozen.
Dessicant pellets should be removed after the first year because otherwise they might draw too much moisture from the seeds. They should be placed back before shipping though, to prevent premature germination.
Tropical species can have a hard time in the freezer. Yet some of them can stay viable way longer than expected.