Dear Angelo; A timely question as I too have been harvesting seeds and will offer some to the Seedex soon. I usually sow them right away (well, with some procrastination), but seeds dry at room temperature and retain viability for at least 6 months maybe more. They'll wrinkle, but seem to do OK. Remember they are very slow to bloom. In your mild climate and with good fertilization you should do well with them. I know the speediest seems to be L radiata pumila, otherwise expect 4 - 6 or 8 years to bloom! Egads! Best Jim W. -- Dr. James W. Waddick 8871 NW Brostrom Rd. Kansas City Missouri 64152-2711 USA Ph. 816-746-1949 Zone 5 Record low -23F Summer 100F +