I got some old iboga seeds, maybe a year old, any chance of sprouting them?

Also I live in Andalucia, Spain, which is hot a dry in the summer and cold-fresh in the winter but still dry.
I have a water source, should I build a poly tunnel? to make a humid area...
all advice welcome
Wood Bless

Not likely . maybe with g3. But normally they ferment in the pods then sprout . best of luck but don't let your hopes get too high if they're old dry seeds ok .