Originally Posted by mrbungalow

Don't use vermiculite. Use coconut choire, sphangum, or even regular potting soil. I have a theory of a slightly acidic environment beeing better than alkaline, but by no means proof.
The best cycle is 10 hrs on and 14 hrs off, MORE cold than warm. Also, you need to get the temperature low when you turn the heat off. I am talking 50-60 degrees F, -not room temperature.

I have also been successful sprouting velutina in this way.

Erlend