I have grown bitter and wax melons, but not serpent melons, but this year I can't get one seed of any of them to germinate! The seed coats are hard, and I tried the hot water soak method, suggested by the company, then a couple of weeks later I tried sprouting some in my seed sprouter - a method which usually either works, or tells me that I have bad seeds, when working with regular seeds. Still, none sprouted in the soil since 4-12, and none in the sprouter since 4-30, and I've been keeping them fairly warm - another suggestion. Today, I took an eye loupe and some tweezers, and carefully picked away at the shells, exposing the seed inside - a couple I ruined, but the rest seem intact. I'll find out if any of these germinate.
Any ideas on tricks to get these, or things like them to sprout? I can't believe that ALL of those seeds could have been bad.