I had no luck last year, but this year I was finally successful. I soaked seed in a very light dose of GA3 and then sowed them in a closed container of vermiculite, set near a north-facing window.
"Growers Report from chelle - N.E. Indiana - Zone 5b
From February 17, 2015 to February 28, 2015 Seeds germinated
In ambient room light.
On February 16, 2015 Seeds sown
Room temp. with minimal GA3."