I’m trying for a second time to grow Washingtonia filifera and robusta palms from seed. I was inspired after reading Palms Won’t Grow Here by David A. Francko. The first seeds I got came with instructions to cold stratify, which didn’t make much sense for a palm, but I followed instructions anyway. After 30 days of cold stratification and 6 weeks in soil, they still haven’t sprouted. Palmtalk.org is a great forum for palm enthusiasts, and no one there said they needed cold stratification. I was told you put them in the dirt and they sprout like weeds. That’s what I am trying for round 2. I just planted them today and they are on a heat mat. Time will tell.