Posted: 04/01/2012 at 09:29
I planted some last (as in a year before you) and have yet to see any flowers but I also have mine in a large planter. I grew a few brassica in with them with no apparent side effects. The soil I use was a basic cheap mix with a bit of perlite and a handful of slow release fert. Sorry I can't be much more help. Regards Nick