Posted: 22/03/2016 at 06:58
I grow rudbeckias from seed every year, and don't find them too tricky. Mine are still currently in their germinating trays. In a couple of weeks I'll prick them out into bigger seed trays and put them in an unheated GH, but I will cover them with plastic lids every night til its reliably warmer, and put fleece over that too if a cold night is forecast. They then go into individual pots and then planted out in garden early June. I am in the southeast, but in a bit of a frost pocket.
hope that helps ....they are well worth the effort