Just received some seeds from Jelitto (Penstemon cyananthus, mensarum and pinifolius). Does anyone have advice on sowing/germination techniques? Jelitto's guide suggests all benefit from sowing at no more than 5 C, with germination taking place irregularly over a long period. I also picked up Gentiana sino-ornata and "Viola coreana Syletta", which are both listed as rapid germinators, without stratification needs. If anyone has experience germinating the Penstemons and Gentian, I'd be in your debt.
