Need advice on how to sow old seeds

[Tasman]

Hello.
I am a beginner when it comes to palm trees.
I have a problem that I need help with. I have bought many seeds of bangalow, and some other Australian palms from queensland 10-11 months ago.
Hadn't had the chance to sow   them last year  because I moved to another place.
Now I finally have time to sow  them.

I kept them in the cellar with temperatures around 17 degrees. I have checked embryos on seeds, looks like they are still alive. 

I want to get as many sprouts as possible and wonder if there is any method that can stimulate old seeds to germinate?

I have read that some people put old seeds in bleach solution to awaken embryos.

Can you give me some advice?
Thanks in advance.