A Burpee introduction in 1979 Long-Keeper stays fresh for 6-12 weeks or more providing fruits for fresh use during the fall and into the winter. The skin of these fruits is a golden orange-red when ripe. Indeterminate. Loved by gardens and trusted by gardeners Burpee© has been introducing fresh garden breakthroughs since 1876. Burpee offers only the highest quality non-GMO seeds hand-picked by expert horticulturalists to thrive in your home garden.