Smyrmium perfoliatum is not the most attractive of plant names, but I’m delighted that I’ve finally established this delicate yellowy-green plant in the garden. It is not easy to grow from bought seed ( seed needs to be fresh, then chilled before sowing), so I bought some plants a couple of years ago and they are now self-seeding happily. In time some thinning may be necessary, but they have stiff competition with the bluebells and the combination is so lovely that I’m happy for them to seed away for the time being.