Hi Allison!
I succeeded!
I had sown them together with Begonia maculata another gorgeous Begonia I also had ordered at the time.
On 22nd February I sowed the first load B.luxurians. I had put them in a heated propagator keeping the temperature around 20-22 C..under an attic window for the light, I have no growing lights.
these came up 9th March = 15 days
The second load sown on 25th February came up the same day as the first load also on the 9th march=only 12 days!!
The third and last load was sown on 1st March and came up 15 March= 14 days
The next days more came up and I had around 60 very tiny hardly visible pin point seedlings! From these 12 survived from which 10 look strong and I think they will make it.
The biggest has leafs of about 4 cm long..
I have taken pictures and when I find them back in my folders will post a few if you like..