It's not so difficult to grow, but the seeds need to be really fresh. You can sow the seeds as soon as they are ripe or winter sow them. The last is what I did, but you will have better results with sowing them in autumn.
Abhege here, ArleneB on Cubits. One giving great testimonials for sowing in vermiculite. I oinked for them. It's funny, I had already looked at this one and was considering them too!