That is amazing!

What did you soak them in? What kind of propagator and what temp?

That is fast. I planted some Broccoli and Brussels sprout on a Saturday morning and germinated the next evening.

Here is a link that might be useful: gardening by the seat of my pants

All I did was nick the seeds and soaked them in warm water overnight,then planted them in seeding mix and put them in my small table top heated propagator which I got from Canadian Tire.It doesn't get too warm but the bottom heat remains constant.I have been using this for years and have always had success with germinating most seeds, but never as fast as these,I was really amazed how fast the seeds came up especially since they were not fresh seeds,in fact the Hibiscus and snail vine seeds are at least 3 years old.